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