Physics Chapter 4 Review Multiple Choice

State the law of inertia.

• The law of inertia states that an object at rest stays at rest and an object in motion stays in motion unless acted upon by an external force.

• The law of inertia states that energy cannot be created or destroyed.

• The law of inertia states that for every action, there is an equal and opposite reaction.

• The law of inertia states that the total momentum of a closed system is constant.

Which of the following best explains the difference between mass, weight, and volume?

• Mass is the amount of matter in an object, weight is the force exerted by gravity on that object, and volume is the space that the object occupies.

• Mass and weight are the same, and volume is the amount of space an object takes up.

• Mass is the force exerted by gravity, weight is the amount of matter, and volume is the space occupied by an object.

• Mass is the space an object occupies, weight is the amount of matter, and volume is the force exerted by gravity.

Suppose you place a ball in the middle of a wagon that is at rest and then abruptly pull the wagon forward. What is the motion of the ball relative to (a) the ground and (b) the wagon?

• The ball remains stationary relative to the ground and backward relative to the wagon.

• The ball moves backward relative to the ground and forward relative to the wagon.

• The ball remains stationary relative to both the ground and the wagon.

• The ball moves forward relative to both the ground and the wagon.

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When a marble is moving in a circular motion and comes to a break in the track, what is the path the marble will take?

• It will continue in a straight path.

• It will fall straight down.

• It will move in a spiral path.

• It will stop immediately.

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Copernicus was the first person to state what?

• The Earth is the center of the universe

• The Sun is the center of the universe

• The Earth revolves around the Sun

• The Moon revolves around the Earth

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When you compress a sponge, which quantity changes?

• Mass

• Inertia

• Volume

• Weight

A 25-N force and a 30-N force act on an object in opposite directions. What is the net force on the object?

• 5 N in the direction of the 30-N force

• 5 N in the direction of the 25-N force

• 55 N in the direction of the 30-N force

• 55 N in the direction of the 25-N force

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An object in motion can be in a state of equilibrium when:

• The net force acting on it is zero.

• It is moving in a circular path.

• It is accelerating uniformly.

If a ball is thrown into a frictionless space, what is the amount of force needed to keep it going?

• Zero force

• Constant force

• Increasing force

• Decreasing force

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Which has more mass—a kilogram of cotton or a kilogram of marble?

• A kilogram of cotton

• A kilogram of marble

• Both have the same mass

• It depends on the volume