Force & Motion Coach Book Review

Which of these affects the motion of an object?

• the position of nearby objects

• the force acting on the object

• the object's length

• the age of the object

A student uses a bat to hit a softball with a certain force. Then she hits a heavier ball with the same force. How does the heavier ball move compared with the lighter softball?

• faster and farther

• faster and not as far

• more slowly and farther

• more slowly and not as far

Which of these is a force?

• a spring scale

• an object's mass

• a push upward

• an object's matter

A student pulls four classroom objects with the same amount of force. On which object's motion will the pull have the greatest effect?

• desk

• chair

• pencil

• textbook

What is gravity?

• the amount of matter that makes up an object

• a measure of how far an object moves in a certain amount of time

• a force that pulls things toward each other

• a force that pushes things away from each other

How does the distance between objects affect the force of gravity between them?

• The greater the distance, the greater the force of gravity.

• The smaller the distance, the greater the force of gravity.

• The smaller the distance, the smaller the force of gravity.

• Distance has no effect on the force of gravity.

Friction is a force that

• pulls objects down to the ground.

• acts when two surfaces touch each other.

• pulls two surfaces apart.

• makes an object move faster.

How does air resistance affect the motion of a falling object?

• It reduces the object’s speed.

• It increases the object’s speed.

• It reverses the object’s direction.

• It has no effect on the object’s motion.

What causes an object to fall to the ground?

• air resistance

• time

• gravity

• friction

What information do you need in order to find the speed of a moving object?

• the mass of the object and the distance it moved

• the distance the object moved and the time it took to move that distance

• the position of the object and the force used to move it to that position

• the length of the object and the direction in which it moved