Chapter 8 Quiz A/B Practice

Why is friction beneficial?

• it helps a farmer plant watermelon

• it helps a person write their name

• it helps a basketball player from slipping on the court

A change in position is

• motion

• work

• energy

• gravity

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

What is measured by how much force it takes to move an object and the distance an object moves?

• energy

• gravity

• friction

• work

What is the bar that turns on a point?

• a wedge

• an inclined plane

• a lever

• a screw

A wheelbarrow is an example of what kind of simple machine?

• lever

• pulley

• inclined plane

• wedge

When the wheel of a wheel and axle turns one time, the wheel...........

• travels a shorter distance than the axle does

• travels a greater distance than the axle does

• does not travel

• travels a shorter and greater distance at the same time

The axle in a wheel and axle turns with _____ force than the wheel does, and the axle moves_____.

• greater,

  greater distance

• less,

  less distance

• less,

  the same distance

• greater,

  less distance

A simple machine made of a wheel with a groove that holds a rope is

• an inclined plane

• a pulley

• a wedge

• a crane

A simple machine that is a wheel with a rod coming through it is

• a screw

• a wedge

• a wheel and axle

• an inclined plane

a flat slanted surface, such as a ramp or slide is

• an inclined plane

• a pulley

• a wheel and axle

• a screw