Chapter 3 Review

The amount of gravitational force between two objects depends on their mass and distance.

• True

• False

When a diver jumps off a diving board, gravity pulls him or her down to the water. What is the reaction force of Earth's gravity?

• air resistance slows the diver

• friction between the diver and the water slow the diver

• the divers legs push against the board

Which of the following is not at factor when determining how fast an object is moving when it is dropped off a building?

• mass of object

• material of object

• air resistance of object

• gravitational strength

The greater an object's mass, the weaker the gravitational force on it

• True

• False

Friction is a force that encourages motion between two surfaces that are touching each other.

• True

• False

When you push downward on Earth to make a pole vault, Earth exerts an equal force on the pole.

• True

• False

When an object moves in a circular path, it accelerates toward the center of a circle as a result of ____________________.

• centripetal force

• frictional force

• gravitational force

• momentum

When the drag force on an object falling through the air equals the force of gravity, the object has reached _________________.

• terminal force

• terminal acceleration

• terminal velocity

• terminal illness

Inertia varies depending on ____.

• force

• mass

• motion

• velocity

The force you have to overcome to start an object moving is ____.

• air resistance

• rolling friction

• sliding friction

• static friction