Force, Motion, and Energy (Coach pp. 33-44)

Friction is a force that

• pull objects toward the center of the Earth

• acts when two objects touch each other

• pulls two objects apart

• makes an object move faster

Which of these is NOT a force?

• friction

• a push

• mass

• gravity

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

• texbook

• pencil

Which tool is used to measure force?

• balance

• spring scale

• meterstick

• clock

If a car travels 140 miles in 2 hours, what is the speed of the car?

• 70 miles

• 280 miles per hour

• 70 miles per hour

• 140 miles per hour

The energy in a battery is

• kinetic energy.

• gravitational potential energy.

• chemical potential energy.

• electrical energy.

Which of these have the least potential energy?

• a roller coaster car at the top of the highest hill

• a roller coaster car at the top of the lowest hill

• a roller coaster car halfway between the top and the bottom of a hill

• a roller coaster car at the bottom of a hill

Any object in motion has

• gravitational potential energy

• kinetic energy

• elastic potential energy

• chemical potential energy

Which form of energy is stored in a Slinky spring toy when the coils are stretched out?

• kinetic energy

• elastic potential energy

• chemical potential energy

• gravitational potential energy