Chapter 2 Quizzes

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

A karate chop delivers a blow of 3000 N to a board that breaks. The force that acts on the hand during this event is actually

3000 N

A piece of rope is pulled by two people in a tug-of-war. Each pulls with 400 N of force. What is the tension in the rope?

400 N

In each second of fall, the distance a freely falling object will fall is

increasing.

A feather and a coin will have equal accelerations when falling in a vacuum because

the ratio of each object's weight to its mass is the same

The mass of a pet turtle that weighs 10 N is about

1 kg

The weight of 0.6 kg of salami is about

6.0 N

An object travels 8 m in the first second of travel, 8 m again during the second second of travel, and 8 m again during the third second. Its acceleration in meters per second per second is

0

A 10-N falling object encounters 10 N of air resistance. The net force on the object is

0 N

A hockey puck is set in motion across a frozen pond. If ice friction and air resistance are neglected, the force required to keep the puck sliding at constant velocity is

0 N

A 10-N falling object encounters 10 N of air resistance. The net force on the object is

0 N.

A skydiver of mass 100 kg experiences air resistance of 500 N, and an acceleration of about

0.5g

When a rock thrown straight upwards gets to the exact top of its path, its velocity is

zero and its acceleration is about 10 m/s/s

Two people, one twice as massive as the other, attempt a tug-of-war with 12 m of rope on frictionless ice. After a brief time, they meet. The heavier person slides a distance of

4 m

A 10-N block and a 1-N block lie on a horizontal frictionless table. To push them with equal acceleration, we would have to push with

10 times as much force on the heavier block

Careful: On the surface of Jupiter, where the acceleration due to gravity is about three times that of Earth, a 100-kg rock would have a mass of about

100 kg

Ten seconds after starting from rest, a freely falling object will have a speed of about

100 m/s

A baseball player bats a ball with a force of 1000 N. The ball exerts a reaction force against the bat of

1000 N

An object released from rest on another planet requires 1 s to fall a distance of 6 m. What is the acceleration in meters per second per second due to gravity on this planet?

12

A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly. This best demonstrates that

the milk carton has inertia

The attraction of a person's body toward the earth is called weight. The reaction to this force is

the person's body pulling on the earth.

A force of 1 N accelerates a mass of 1 kg at the rate of 1 m/s/s. The acceleration of a mass of 2 kg acted upon by a force of 2 N is

the same

The brakes are slammed on a speeding truck and it skids to a stop. If the truck were heavily loaded so it had twice the total mass, the skidding distance would be

the same

Neglecting friction, a large block of ice and a small block of ice start sliding down an incline together. The heavier block will get to the bottom

the same time as the light block

An apple weighs 1 N. The magnitude of net force on the apple when it is in free-fall is

1 N

A rock is thrown vertically into the air. At the top of its path, its acceleration in meters per second per second is about

10

A 1-kg ball is thrown at 10 m/s straight upward. Neglecting air resistance, the net force that acts on the ball when it is half way to the top of its path is about

10 N

Disregarding air drag, how fast must you toss a ball straight upward in order to remain in the air for a total time of 2 s?

10 m/s

A 2000-kg car experiences a braking force of 10,000 N and skids to a stop in 6 s. The speed of the car just before the brakes were applied was

30 m/s.

A Mack truck and a Volkswagen traveling at the same speed have a head-on collision. The vehicle to undergo the greatest change in velocity will be the (Volkswagen, both the same, Mack truck.)

Volkswagen

Your friend says that the heavyweight champion of the world cannot exert a force of 50 N on a piece of tissue paper with his best punch. The tissue paper is held in midair, no wall, no tricks. You

agree that it can't be done.

A heavy object and a light object are dropped at the same time from rest in a vacuum. The heavier object reaches the ground

at the same time as the lighter object

Earth pulls on the Moon. Similarly the Moon pulls on Earth, evidence that

both of these.

If an object falls with constant acceleration, the velocity of the object must

continually change by the same amount each second.

A skydiver jumps from a high-flying plane. As her velocity of fall increases, her acceleration

decreases

When an object falls through the air, its velocity increases and its acceleration

decreases

A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always

directed downward

An elephant and a feather fall from a tree through the air to the ground below. The amount of air-resistance force is greater on the

elephant.

A player catches a ball. Consider the action force to be the impact of the ball against the player's glove. The reaction to this force is the

force the glove exerts on the ball.

Consider drops of water that leak from a dripping faucet. As the drops fall, they

get farther apart

An object is propelled along a straight-line path in space by a force. If the mass of the object somehow becomes twice as much, its acceleration

halves

An object following a straight-line path at constant speed

has zero acceleration

Two objects of the same size, but unequal weights are dropped from a tall tower. Taking air resistance into consideration, the object to hit the ground first will be the

heavier object.

A car traveling at 100 km/h strikes an unfortunate bug and splatters it. The force of impact is greater on the

is the same for both

A rock is thrown vertically into the air. At the very top of its trajectory the net force on it is

its weight

A light woman and a heavy man jump from an airplane at the same time and open their same-size parachutes at the same time. Which person will get to a state of zero acceleration first?

light woman

Strange as it may seem, it is just as hard to accelerate a car on the Moon as it is to accelerate the same car on Earth. This is because the

mass of the car is independent of gravity.

An object maintains its state of motion because it has

mass.

A falling object that has reached its terminal speed continues to gain (speed, acceleration, neither, both)

neither

A horse exerts 500 N of force on a heavy wagon. The wagon pulls back on the horse with an equal force. The wagon still accelerates because

nevertheless there is still an unbalanced force on the wagon

While a car travels around a circular track at a constant speed, its (acceleration is zero, both of these, velocity is zero, none of these)

none of these

The force exerted on the tires of a car to directly accelerate it along a road is exerted by the

road

Neglecting friction, a large block of ice and a small block of ice start sliding down an incline together. The heavier block will get to the bottom

the same time as the light block.


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