Science Ch.4 Review

the weight of the object being moved

• effort

• friction

• load

• gravity

an object that makes work easier

• machine

• motion

• friction

• effort

the force that pulls objects toward the earth

• effort

• friction

• motion

• gravity

the force applied to cause a simple machine to do work

• gravity

• effort

• machine

• motion

the force that resists the movement of objects against each other

• gravity

• motion

• effort

• friction

a change in position

• effort

• motion

• machine

• gravity

A greater mass requires ____force to move it.

• less

• the same

• a greater

A 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

• gravity

• energy

• force

A block and tackle allows you to use___force when lifting an object because the rope moves a greater distance.

• less

• the same

• more