Physics Chapter 5 Test

A vertical vector of 3 units combined with a horizontal vector of 4 units has a resultant of

5 units

Joshua is attracted toward Earth by a 500-N gravitational force. The Earth is attracted toward Joshua with a force of

500 N

The resultant of a 30-N force and a 40-N force cannot possibly be

80 N

If action is a foot kicking a soccer ball, the reaction is an equal force on the

foot

As a ball bounces from a floor, its acceleration off the floor between bounces is

g

The normal force that acts on a block of ice that slides on a ramp

gets progressively less as the slope of the ramp increases.

A player catches a ball. If action is the force of the ball against the player's glove, reaction is the

glove against the ball.

A car traveling at 100 km/hr strikes an unfortunate bug and splatters it. The acceleration is

greater on the bug

Neglecting air resistance, once a tossed ball leaves your hand

only the force due to gravity acts on it

Neglecting air resistance, once a tossed ball leaves your hand

only the force due to gravity acts on it.

When you walk, you push on the floor to the left and the floor

pushes you to the right.

Nellie tosses a ball upward at an angle. Neglecting air resistance, the horizontal component of the initial velocity

remains constant

The force due to gravity that acts on a block of ice that slides down an icy ramp

remains equal to mg at all angles

The force due to gravity that acts on a block of ice that slides down an icy ramp

remains equal to mg at all angles.

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

road

When Nellie Newton hangs by a pair of ropes at different angles to the vertical, the rope tension is greater in the rope that makes the

smallest angle to the vertical.

When a tennis racquet hits a ball

the ball hits the racquet

When a cannonball is fired from a cannon, which undergoes the greater acceleration?

the cannonball

The force that propels a heavy truck along a highway is provided by

the highway pushing back on the wheels of the truck.

Earth pulls on the Moon with a certain force. Relative to this force, the pull of the Moon on Earth is

the same

A mosquito has a collision with the windshield of a massive high-speed truck. The force of impact on the mosquito is ________ the force on the truck, and the acceleration of the mosquito is ________ the deceleration of the truck.

the same as; more than

You stand on your skateboard and exert a 50-N push on the wall next to you. If your mass is 60 kg you'll momentarily accelerate from the wall at about

0.8 m/s2

Whenever one object exerts a force on a second object, the second object exerts a force on the first that a) is opposite in direction. b) is equal in magnitude. c) occurs at the same time. d) All of these.

All of these

A Mack truck and a Volkswagen traveling at the same speed have a head-on collision. The vehicle that undergoes the greatest change in velocity will be the

Volkswagen

As the sloped surface supporting a shoe becomes steeper a) friction needed to keep it at rest increases. b) the normal force becomes less. c) the shoe's weight mg remains unchanged. d) all of the above

all of the above

When a skateboarder pushes on a wall, a) the wall pushes on the skateboarder b) such a push couldn't happen unless the wall pushed on the skateboarder. c) an interaction occurs between the skateboarder and the wall. d) all the above

all the above

Art museums use weaker wires than those used in homes because paintings in museums

are suspended by pairs of vertical wires

An archer shoots an arrow. Consider the action force to be the bowstring against the arrow. The reaction to this force is the

arrow's push against the bowstring.

Arnold Strongman and Suzie Small each pull very hard on opposite ends of a rope in a tug-of-war. The greater force on the rope is exerted by

both the same

When you rub your hands together, you

cannot push harder on one hand than the other

A shoe on an inclined surface barely remains at rest when friction equals the

component of mg parallel to the surface.

The normal force that acts on a block of ice that slides on a ramp

decreases as the slop of the ramp increases

The normal force that acts on a block of ice that slides on a ramp

decreases as the slope of the ramp increases.

Nellie tosses a ball upward at an angle. Neglecting air resistance, the vertical component of the initial velocity

decreases with time to reach the top.

A pair of toy freight cars, one twice the mass of the other, fly apart when a compressed spring that joins them is released. Acceleration will be greater for the

lighter car

The amount of force with which a boxer's punch lands depends on the

mass of what's being hit.

When you jump vertically upward, strictly speaking, you cause Earth to

move downward

To produce an acceleration to a system there

must be a net force on the system

A boulder falls due to gravity. The reaction to the force on the boulder is

the boulder pulling up on Earth

You run horizontally at 4 m/s in a vertically falling rain that falls at 4 m/s. Relative to you, the raindrops are falling at an angle of

45°.

One end of a rope is pulled with 100 N, while the opposite end also is pulled with 100 N. The tension in the rope is

100 N

When a baseball player bats a ball with a force of 1000 N, the reaction force that the ball exerts against the bat is

1000 N

An astronaut of mass 70 kg weighs 700 N on Earth. His weight on Mars, where the "a" is 3.7 m/s^2

260 N

The airspeed of an airplane is 200 km/h. When it is caught in a 200-km/h crosswind, its speed across the ground below is

283 km/h

When a karate chop breaks a board with a 3000-N blow, the amount of force that acts on the hand is

3000 N

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

400 N

An axe is swung against a tree with a blow of 4000 N. The force that acts on the axe during this event is

4000 N

The emphasis of the orange-and-apple sequence in your textbook is

defining systems

When the neck of an air-filled balloon is untied and air escapes, the balloon shoots through the air. The force that propels the balloon is provided by the

ejected air

The force with which Earth pulls on the Moon is

equal in magnitude to the force that Moon pulls on Earth

The force with which Earth pulls on the Moon is

equal in magnitude to the force that Moon pulls on Earth.

Horizontal and vertical components of velocity are equal when the projection angle is

equal to 45°.

Two identical carts have a compressed spring between them. When the spring is released, the carts recoil from each other with oppositely directed accelerations that are

equal.

When a boxer hits a punching bag, the strength of his punch depends on how much force the bag can

exert on the boxer's fist

When a squid pushes against water, the squid moves forward because the water

exerts a net forward force.

For every action force, there must be a reaction force that

is equal in magnitude

The net force on a kicked soccer ball can be zero when

it is kicked by two feet with equal and opposite amounts of force.

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

the same for both

An automobile and a golf cart traveling at the same speed collide head-on. The impact force is

the same for both

A force is a push or pull that is required to change the

the state of motion of an object.

A massive truck and a golf cart have a head-on collision with equal amounts of force. The least amount of acceleration occurs for

the truck

A force interaction requires at least

two forces

You cannot exert a force on a wall

unless the wall simultaneously exerts the same amount of force on you.