Chapter 4 Simple Machines

The weight of the object being moved is the ....

• load

• friction

• gravity

An object that makes work easier is

• effort

• machine

• motion

The force that pulls objects toward the earth

• gravity

• friction

• motion

The force applied to cause a simple machine to do work

• effort

• load

• motion

The force that resists the movement of objects

• friction

• gravity

• effort

A change in position is . ...

• motion

• load

• effort

A greater mass requires ____ force to move it.

• less

• greater

• the same

The force moving an object over a distance is called ...

• work

• gravity

• friction

The amount of work you do depends on how much ____ you use to move an object.

• force

• energy

• gravity

A block and tackle (pulley system) allows you to use ___ force when lifting an object because the rope moves a greater distance.

• less

• more

• the same