AP Physics 1 Final
An elevator has a mass of 500 kg. It may safely carry an additional mass of 1000 kg and Accelerating Upward at 2 m/s^2. What is the tension in the cable under these maximum conditions?
18000 N
A rope stretched between two fixed points can support transitive standing waves what is the ratio of the six harmonic frequency to the third harmonic frequency?
2
A rectangular book weighing 20 N with sides of 10 cm and 20 cm is placed on a horizontal table. Using each of your hands you exert forces of 10N each in opposite directions at opposite Corners such that you were pushing the parallel to the shorter side in each case. What network are you providing on the book?
2 N x m
Two traveling waves of equal frequency, one of amplitude 4 cm and the other of amplitude 6 cm, superimpose in a single medium. Which of the following best describes the displacement, D, of the resultant wave?
2 cm <= D <= 10 cm
An object of 100 kg rests on a horizontal floor. The coefficient of static friction is 0.4 between the object and the floor. If the constant force of 250 N is pushed horizontally on the object what is the magnitude of the force of static friction ?
250 N
If each of the resistors in the circucit has a resistance of 3 ohms, what must be the emf of the battery if the circuit draws a total current of 3 A?
30 V
A person is pulling a block of mass m with a force equal to its weight directed 30 degrees above the horizontal plane across a rough surface, generating a friction F on the block if the person is now pushing downward on the block with the same Force 30 degrees above the horizontal plane across the same rough surface, what is the fiction on the block?
3f
If the distance between X and Y is doubled, then X will attract Y with a force of
4 N
Which of the following charges is NOT possible?
4.8 x 10^-20 C
You are standing on a railroad track as a train approaches at a constant velocity suddenly the engineer sees you applies the brakes and sounds the whistle which of the following describes the sound of the whistle as you hear it starting from that moment?
Loudness increasing, pitch decreasing
If the object's initial velocity is 2 m/s what will be the object's velocity after this Force acts upon the object?
9 m/s
In the figure above are two blocks of mass 3m and 2m attached together. The plane is frictionless and the pulley is frictionless and massless. The inclined portion of the plane creates an angle with the horizontal floor. What is the acceleration of the block 2m if both blocks are released from rest?
(2/5) g sin θ
A projectile is launched with an initial velocity of magnitude a at angle B to the horizontal. Find its maximum vertical displacement, ignoring its effects due to the air
(a^2 sin^2 2B)/ 2g
The figure above shows two positively charged particles. The =Q char is fixed in position and the +q charge is thought close to +Q and realized from rest. Which of the following graphs best depicts the acceleration of the +q charge as a function of its distance r from +Q?
(the graph that is a slide starting from the top left )
A box of mass, m, is sitting on an incline of 45 degrees and it requires an applied force f up the incline to get the box to begin to move. what is the maximum coefficient of static friction?
(√2 F/ mg)-1
In the graph above, the instantaneous velocity at 9 seconds is closet to
-11/4 m/s
What is the power developed by the force?
0
A spring stretches 4.0 CM when a 0.2 kg mass is hung from it. The mass is lifted up 4 cm and dropped. The following graph represents the net force acting on a spring as it falls 8 cm from the top to bottom. What is the net work done as the mass falls from 0 to 8 cm?
0 J
An object of mass 3 kg is undergoing uniform circular motion. The object's speed is 4 m/s, and the radius of the path that is 0.5 m. How much work is done on this object by centripetal force?
0 J
If the coefficient of friction between the block and the incline is 0.4 how much work is done by the normal force on the block as it slides down the full length of the incline?
0 J
A simple harmonic oscillator has a frequency of 2.5 Hz and an amplitude of 0.05 m. What is the period of the oscillations?
0.4 s
How much current does a 60 W light bulb draw if it operates at a voltage of 120v?
0.5 A
In the figure above, the coefficient of sliding friction between the small block and the tabletop is 0.2. If the pulley is frictionless and massless. What will be the acceleration of the block once they are released from the rest?
0.7 g
What is the object's acceleration during the interval t=0 to t=3s
1 m/s^2
A 12-volt battery is advertised as a "40 amp hour" battery. The manufacturer is expressing that the battery has a capacity of
1,728,000
A satellite weighs 10^4 N at Ground Control. What best approximates the acceleration it experiences in orbit at an altitude of twice the Earth's radius?
1.1 m/s^2
Small cart of mass m is initially at rest. It collides elastically with a large card mass for M and velocity V. The large car loses half its kinetic energy due to the little car. The little cart now has a velocity of
1.41v
Two objects are sitting on a uniform stick that pivots around its center. Object 1 has a mass of 20 kg and Object 2 has a mass of 30 kg. If the Object 2 sits 1 m to the left of the center of the stick, how far to the right of the center of the stick must Object 1 sit in order to balance the stick?
1.5 m
Two equal positive charges are r distance apart. If the amount of charge on one is doubled and the distance between the charges is doubled what is the ratio of new Electric force to old electric force?
1/2
If the rod in the figure above is uniform and has mass m, what is the tension in the supporting string? The rod is free to rotate about point P
1/2 mg
For the circuit shown above, what is the voltage of the battery (assuming the battery has no internal resistance)?
10 V
If the surface of the incline is frictionless, with what speed will the block reach the bottom if it was released from rest at the top?
10 m/s
An object of mass 5 kg is acted upon by exactly four forces each magnitude of 10 N which of the following could not be the result acclimation of the object?
10 m/s^2
A 1000 kg object is hung on a string in between two identical towers that are 340m apart. The objects sits 100m below the height of the towers what is the tension in the strings?
10kN
What is the distance an object covers during the interval t=0s to t=5s
15 m
The force with which Y attracts X is equal to
16 N
A rope of length 60 cm is tied to the handle of a bucket whose mass is 30 kg and the bucket is then whirled in a vertical circle. At the bottom of its path the tension of the Rope is 50 N what is the speed of the bucket at this point?
2 m/s
If the surface of the incline is frictionless, how long will the block take to reach the bottom if it as released from rest at the top?
2.0 s
The gravitational force the sun exerts on the earth is F. Mars is 1.5 times from the Sun than the earth and its mass is 1/6 of the Earth's mass. What is the gravitational force that the sun exerts on Mars?
2/27 F
An object of mass, m, moving with the speed of V collides head-on with a Target object of mass 2m initially at rest. f the collision is perfectly inelastic what fraction of object ones kinetic energy is lost?
2/3
100 kg object is attached to a spring mounted to the ceiling with the spring coefficient of K=100 N/m. If the spring is stretched by 30 m from the initial resting position with the block attached what is the acceleration at that point?
20 m/s^2
The magnitude of the car's centripetal force is equal to
20,000 N
A crane lifts our shopping crate that weighs 5000 N at a constant speed of 4 m/s. At what rate is this crane doing work for the crate?
20,000 W
An object is thrown horizontally off a high cliff at 7.5 m/s (assume altitude near sea level and neglect air resistance). What is its displacement after 2 seconds?
25 m
An astronaut lands on a planet whose mass and radius are each twice that of the earth. If the astronaut weighs 800 newtons on Earth how much will he weigh on this planet?
400 N
An object has a kinetic energy of K. If the speed of the object were doubled what would be the resulting kinetic energy?
4K
Object 1 of mass 0.25 kg moves at 10 m/s towards Object 2 initially at rest of mass 0.25 kg. The resulting collision is perfectly inelastic, what is the speed of the objects after the collision?
5 m/s
A spring of force constant 800 N/m is hung from a ceiling. A block of mass 4.0 kg is hung from its lower-end and allowed to come to rest. how far will the block stretch from the spring?
5.0 cm
A tube with one end closed in one end open resonates for a wave with wavelength λA as shown the next shorter wavelength at which resonance will occur is λB. Of curved is the ratio of these two wavelengths is λA/λB is
5/3
An object begins at rest at the top of an inclined frictionless plane with height of 125 m in a horizontal length (not the hypotenuse) of 200 m. What will be the speed of the object at the end of the inclined plane ?
50 m/s
If V= 100 V, R1=50 ohms, R2=80 ohms, and R3= 20 ohms. Determine the voltage across R3.
60 V
The sun is approximately 150 million kilometers from the earth. A year- the time for one revolution of the Earth around the Sun- is roughly π * 10^7 seconds. Assume the circular orbit what best approximates the average acceleration of the Earth due to the Sun?
6x10^-3
What is the magnitude of the impulse on the force?
7 N x s
Which of the following concerning uniform circular motion is true?
A satellite undergoing uniform circular motion is falling towards the center in a circular path
The figure above shows a plane diagram. The figure shows four point charges are arranged at the corners of a square with point B as it Center. A positive charge would experience no net force if it were placed at which of the three points shown in the figure
B only
In which of the following situations involving a source of sound and a detector of the sound is it possible that there is NO perceived Doppler shift?
Both the source and the detector travel in the same direction
A moon has elliptical orbit around the planet as shown above. At Point a the moon has speed VA and it is at a distance RA from the planet. At point B the moon has a speed of VB. Which of the following correctly explains the method for determining the distance of the Moon from the planet at point B in the given quantities?
Conservation of angular momentum, because the gravitational force exerted on the moon is always directed toward the planet
A person standing on a horizontal floor is acted upon by two forces: the downward pull of gravity and the upward normal force of the floor. These two forces
Have equal magnitudes and do not form an action-reaction pair
Which of the following changes to a circuit will always bring about an increase in the current?
Increase voltage decrease resistance
a while sanding on a moving train you are suddenly thrown forward as the train stops. This effect can be best explained using Newton's law of
Inertia
Sound wave travel at 350 m/s through warm air and at 3500 m/s through brass. What happens to the wavelength of a 700 Hz acoustic wave as it enters brass from warm air?
It increases by a factor of 10
How does the time required for the vertically projected sphere to hit the floor compare with that for the horizontally projected sphere?
It is greater but not necessarily twice as great
How does the work done by gravity to the vertically launched sphere compare to the work done by gravity to the horizontally launched sphere?
It is the same
How does the speed of the vertically launched sphere compare to the speed of the horlzontally launched sphere as they each hit the floor?
It is the same time
What happens to the force of gravitational attraction between two small objects if the mass of each object is doubled and distance between their center is doubled?
It remains the same
A mass on a spring and a simple pendulum undergoes simple harmonic motion. There is no friction present for the mass on the string. Which of the following statements are true? Select two answers.
Mechanical energy is constant; the period of mass is constant
Which of the following must be zero If an object Is spinning at a constant rate?Select two answers
Net torque; angular acceleration
Which of the following relates PB the rate at which energy is dissipated by resistor b, and PE the rate at which energy is dissipated by E?
PE=9PB
Wire Y is made of the same material but has twice the diameter and half the length o Wire X . If Wire X has a resistance of R then Wire Y would have a resistance of
R/8
Wire #1 has three times the length and twice the diameter of Wire #2. If both wires are made of the same material and if R1 is the resistance of Wire #1 and R2 is the resistance of Wire # 2 then which of the following is true?
R2=(4/3)R1
A 2 kg mass is attached to a massless, 0.5 m string and is used as a simple Pendulum by extending it to an angle θ=5 degrees and allowing it to oscillate. Which of the following changes will change the period of the pendulum? Select two answers.
Replacing the string with a 0.25 m string; moving the pendulum to the surface of the Moon
If the acceleration of an object is not zero then which of the following could be constant? Select two answers
Speed; Kinetic Energy
Two objects a spear and a block of the same mass are released from rest at the top of an inclined plane. the sphere rolls down the inclined plane without slipping. The block slides down the plane without friction. Which object reaches the bottom of the ramp first?
The block because it does not gain rotational kinetic energy, but the sphere does
Two objects A&B have equal charges and equal Mass. Either body is in motion because the gravitational and electrostatic forces between them are equal. If the mass of Object A is halved, equilibrium will be maintained if
The charge on Object B is halved
N resistors (N> 2) are connected in parallel with a battery voltage of V. If one of the resistors is removed from the circuit which of the following quantities will decrease? Select two answers.
The current output by the battery; the total power dissipated by the circuit
A musician plucks a spring on acoustic guitar. Standing waves the most likely occur in which of the following media? Select two answers.
The guitar string ; the air inside the guitar
A projectile is launched at an angle such that it undergoes projectile motion. In the absence of any air resistance, which of the following statements is correct?
The horizontal velocity remains constant during the flight
Lightweight toy car crashes head-on into a heavier toy truck. Which of the following statements is true as a result of the Collision? Select two answers.
The magnitude of the acceleration experienced by the car will be greater than that experienced by the truck; The total movement in the Coalition will be conserved
The diagram above shows the top view of an object of mass M on a circular platform of mass 2M that is rotating counter-clockwise. Assume that the platform rotates without friction. Which of the following best describes an action by the object that will increase the angular speed of the entire system?
The object moves toward the center of the platform, decreasing the rotational inertia of the system
An object is traveling at x m/s can stop at distance, d, what's the maximum negative acceleration. If the car is traveling 2x m/ which of the following statements are true? Select two answers
The stopping time is doubled; the stopping distance is quadrupled
An old record player could bring a disk up to its 45 RPM speed in less than a second. If the same size disk can also be brought up to a speed of 75 RPM in about the same amount of time on another player, compare the two torques
The torque would be larger in the second case as it requires a greater angular acceleration
An object is in free fall for T seconds. Compare its change in velocity during the first T/2 seconds with its change in velocity during the final T/2 seconds
They are the same
A sound wave travels through a metal rod with wavelength λ and frequency f. Which of the following is true? Select two answers.
When the sound wave passes into air, the wavelength will change; while in the metal rod the λ and frequency f have an inverse relationship
A simple pendulum executes simple harmonic motion as it swings through the amplitude of oscillations , which of the following statements is true?
When θ=0, the tangential acceleration is 0.
An alarm was frequency is 400 Hz is dropped out of a third-floor window the student who drops it measures a frequency with a very sensitive oscilloscope. The measured frequency
appears lower than 400 Hz and the frequency decreases as it falls
Compare the force experienced by an electron in the two situations shown above. In the situation on the left, the electron is a distance D from a positive charge Q. In the situation on the right, the electron is 3 times farther (3D) from 3 times as much positive charge (3Q) as in the scenario on the left. The force of electrical attraction in the scenario on the right will
be 3 times weaker than the situation on the left
Two charges are placed as shown at the vertices of an equilateral triangle . What is the direction of the electric field at point P
d
If R1 were to burn out the current coming up from the battery would
decrease
A planet has half the mass of Earth and half the radius. Compared with the acceleration due to gravity at the surface of Barth, the acceleration due to gravity at the surface of this planet is
doubled
For a falling object to reach terminal velocity (a constant downward speed), the magnitude of the force due to air friction must be
equal to mg
The centripetal force necessary to keep the car in its circular path is provided by
friction
The sound of a moving siren from the west of you that is traveling toward you is transmitted through the air to your ear and is
heard at a higher frequency than usual
Complete the analogy Fonce is to torque as ________is to moment of inertia
mass
A beam of monochromatic light entering a glass window pane the ai will experience a change in
speed and wavelength
What is teh period of the stopper?
sqrt((4pi^2MR)/F)
A woman standing on a scale in an elevator notices that the scale reads her true weight. Prom this, she may conclude that
the elevator must not be accelerating
Two people. one of mass 100 kg and the other of mass 50 kg stand facing each other on an ice-covered (essentially frictionless) pond. If the heavier person pushes on the lighter one with a force F, then
the magnitude of the acceleration of the lighter person will be twice the magnitude of the acceleration of the heavier person
A sound wave with frequency F travels through the air at speed V. With what speed will a sound wave with frequency 4f travel through the air?
v
A ball is thrown in a projectile motion projectile with an initial velocity V at an angle θ above ground. If the acceleration due to gravity is -g, which of the following is correct expression of time it takes for the ball to reach its highest point, y, from the ground?
v sin θ/ g
Determine the total power just a painted through the circuit shown above in terms of V, R1 ,R2 , and R3.
v^2 (R1+R2+ R3) / R1 (R2+R3)
