Honors Physics Final S1
Two neutral conducting pop cans are touching each other. A positively charged glass rod is brought near Can X. Which of the following occur as the glass approaches Can X? List all that apply.
...nonsense! None of these occur.
A ball of mass 0.5 kg, initially at rest, acquires a speed of 5 m/s immediately after being kicked by a force of strength 20 N. For how long did this force act on the ball?
0.1 s
An object is dropped and falls freely to the ground with an acceleration of 1 g. If it is thrown upward at an angle instead, its acceleration would be _____
1 g downward
A neutral metal sphere is touched by a negatively charged metal rod. During the process, electrons are transferred from the _____ to the _____ and the sphere acquires a _____ charge.
Charged rod, neutral sphere, negative
The SI unit of charge is the
Coulomb
A neutral metal sphere is touched by a negatively charged metal rod. As a result, the sphere will be_____ and the metal rod will be _____.
Negatively charged, negatively charged
According to Kepler's second law, a planet must move fastest when it is _____ the sun
closest to
A truck driving along a highway road has a large quantity of momentum. If it moves at the same speed but has twice as much mass, it's momentum is_____
doubled
If the radius of the Earth decreased, with no change in mass, your weight would
increase
Cars are equipped with padded dashboards. In collisions, the padded dashboards would be safer than non-padded ones because they _____
increase the impact time
One object has twice as much mass as another object. The first object also has twice as much
inertia
If the force acting on a cart doubles, what happens to the cart's acceleration?
it doubles
Which of the following is the motion of objects moving in two dimensions under the influence of gravity?
projectile motion
The vector sum is called the _____
resultant
Identify the following quantities as scalar or vector: the mass of an object, the number of leaves on a tree, wind velocity
scalar, scalar, vector
Which geographic pole of the Earth is nearest to the magnetic north pole of the Earth
south pole
Magnetic field strength is
strongest close to a magnet
The impulse of an object is equal to _____
the change in momentum
A heavy person and a light person parachute together and wear the same parachutes. Assuming they open their parachutes at the same time, which person reaches the ground first?
the heavy person
Which has more momentum, a large truck moving at 30 miles per hour or a small truck moving at 30 miles per hour?
the large truck
Suppose you're driving down the highway and a moth crashes into the windshield of your car: Which undergoes the greater acceleration?
the moth
The evidence that stimulated Newton to propose the law of universal gravitation emerged from a study of
the motion of the moon and other celestial or heavenly bodies
A metal sphere is electrically neutral. It is touched by a positively charged metal rod. As a result, the metal sphere becomes charged positively. Which of the following occur during the process? List all that apply.
- Electrons are transferred from the sphere to the rod - The metal sphere loses electrons - The overall charge of the system is conserved
A neutral metal sphere id touched by a positively charged metal rod. During the process, protons are transferred from the _____ to the _____ and the sphere acquires a _____ charge.
...nonsense! None of these describe what occurs.
Which is a complete descriptions of the momentum of an object?
1.9 kg*m/s, west
The mass of a dog that weighs 100 N is about
10 kg
A cannonball is fired at some angle into the air. In the first second it moves 10 meters horizontally. Assuming it doesn't hit the ground and air resistance is small, how far does it move horizontally in the next second
10 m
A 10 kg brick and a 1 kg book are dropping in a vacuum. The force of gravity on the 10 kg brick is
10 times as much as the force on the 1 kg book
What is the maximum possible resultant of a pair of vectors with magnitudes of 4 and 6 units?
10 units
How much force is needed to accelerate a 2 kg physics book to a acceleration of 6 m/s²?
12 N
A cannonball is launched from the ground at an angle of 30 degrees above the horizontal and a speed of 20 m/s. Ideally (no air resistance) the ball will land on the ground with a speed of
20 m/s
A 10 N force and a 30 N force act in the same direction on an object. What is the net force on the object?
40 N
In the absence of air resistance, the angle at which a thrown ball will go the farthest is
45 degrees
A 20 N block is being pushed across a horizontal table y an 18 N force. If the coefficient of kinetic friction between the block and the table is 0.4, find the acceleration of the block.
5 m/s²
A woman weighing 500 N sits on the floor. She exerts a force on the floor of
500 N
A ball is hurled into the air at an angle of 30 degrees above the horizontal and lands on a target that is at the same level as that where the ball started. The ball will also land on the target if it is thrown at an angle of _____
60 degrees
A string attached to an airborne kite was maintained at an angle of 40 degrees with the ground. If 120 m of string was reeled in to return the kite back to the ground, what was the horizontal displacement of the kite? (assume the string did not sag)
92 m
Planets move around the Sun in _____ orbits
Elliptical
TF: An object that is electrically neutral contains only neutrons
False
TF: An object that is negatively charged could contain only electrons with no accompanying protons
False
TF: An object that is positively charged contains all protons and no electrons
False
TF: Impulse is a force
False
TF: Two neutral conducting pop cans are touching each other. A negatively charged balloon is brought near Can X as shown. As the balloon approaches Can X, there is a movement of electrons between the balloon and Can X (in one direction or the other).
False
TF: When an object becomes polarized, it acquires a charge and becomes a carged object
False
A positively charged piece of styrofoam is places on the table. A neutral aluminum pie plate is brought near as shown below. While held above the Styrofoam, the aluminum plate is touched (grounded). At this point, there is a movement of electrons. Electrons move _____.
Into the aluminum plate from the ground (hand)
A positively charged balloon is brought near a neutral conducting sphere. While the balloon is near, the sphere is touched (grounded). At this point, there is a movement of electrons. Electrons move _____.
Into the sphere from the ground (hand)
Two neutral conducting pop cans are touching each other. A positively charged balloon is brought near one of the cans. The cans are separated while the balloon is nearby. After the balloon is removed, the cans are brought back together. When touching again, can X is _____.
Neutral
During a physics lab, a plastic strip was rubbed with cotton and became positively charged. The explanation for why a plastic strip becomes positively charge is that...
The plastic strip lost electrons to the cotton during the charging process
Which of the following does NOT exhibit parabolic motion?
a flat piece of paper released from a window
Which of the following is NOT an example of projectile motion?
a hot-air balloon drifting toward Earth
What is the path of a projectile?
a parabola
Which of the following has the largest momentum?
a pickup truck traveling down the highway
When you jump off a step, you usually bend your knees as you reach the ground. By doing this, the time of the impact is about 10 times more what it would be in a stiff-legged landing and the average force on your body is reduced by _____
about 10 times
A ball thrown in the air will never go as far as physics ideally would predict because _____
air friction slows the ball
A car traveling along the highway needs a certain amount of force exerted on it to stop. More stopping force may be required when the car has _____
all of the above
Conservation of charge means that
all of the above
Equilibrium occurs when
all of the above
Friction
all of the above
In order to increase the final momentum of a golf ball, we could _____
all of the above
The gravitational force between two masses
all of the above
The law of inertia states that an object
all of the above
At what part of a path does a projectile have minimum vertical speed?
at the top of its path
Protons and electrons
attract each other
If you break a bar magnet in half, each half
becomes a bar magnet with two poles
Suppose you're driving down the highway and a moth crashes into the windshield of your car: Which undergoes the greater impulse?
both the same
Electrical polarization occurs when
charge distribution in a neutral molecule separates
When there is no air resistance, objects of different masses
fall at equal acceleration with similar displacements
Accelerations are produced by
forces
Which of the following are examples of field forces?
gravitational, electrical, magnetic
While rollerblading, Granny collides with her tiny grandson Ambrose who is at rest. Ignoring any friction effects, Ambrose's speed after the collision will be greatest when _____
he and Granny make a bouncing collision, each going their separate ways
The momentum of an object is defined as the object's _____
mass times its velocity
An airplane flying into a head wind loses ground speed, and an airplane flying with the wind gains ground speed. If an airplane flies at right angles to the wind, then ground speed is _____
more
At the instant a ball is thrown horizontally with a large force, an identical ball is dropped from the same height. Which ball hits the ground first?
neither -- they both hit the ground at the same time
A negatively charged rod is brought near a metal can that rests on a wood table. You touch the opposite side of the can momentarily with your finger. The can is then
positively charged
A ping-pong ball launcher is fired. Compared to the foce on the ball, the force on the launcher is
the same
Compares to its mass on Earth, the mass of a 10 kg object on the moon is
the same
Compared to a sport car moving at 30 miles per hour, the ame sports car moving at 60 miles per hour has
twice the momentum
Momentum is a _____ quantity
vector
Which of the following is a physical quantity that has a magnitude and a direction?
vector
After a cannonball is fired into frictionless space, the amount of force needed to keep it going equals
zero, since no force is necessary to keep it moving
