Chapter 11 - Forces

A train is traveling west at 80 miles per hour.  The "80 miles per hour is the train's...

• velocity
• speed
• acceleration
• direction

The force that acts on the surfaces along which objects touch is...

• inertia
• velocity
• gravity
• friction

What force between objects is affected by the amount of matter in the objects and the distance between the objects?

• inertia
• gravity
• friction
• speed

What type of force CAN NOT change a motion?

• balanced force
• unbalanced force

What type of force CAN cause a change in an object's direction, speed, or both?

• balanced force
• unbalanced force

Force is measured in units called...

• kilometers per hour
• newtons
• centimeters
• meters

When force is used to move an object a certain distance, what is being done?

• energy
• friction
• work
• inertia

Energy is...

• a result of friction.
• the motion of an object.
• the ability to do work.
• the result of inertia.

The energy of motion is also called...

• inertia
• movement
• kinetic energy
• potential energy

Any kind of object that is being moved by a simple machine is called a

• lever
• fulcrum
• pulley
• load