Chapter 3 Work Power Simple Machines

Which simple machine is thick at one end and tapers to a sharper edge at the other end?

• wheel and axle
• pulley
• wedge
• lever

a grooved wheel with a rope wrapped around it

• inclined plane
• lever
• pulley
• wheel and axle

What is work?

• a force exerted on an object
• movement of an object without a force
• a push or pull exerted on an object
• a force exerted on an object that causes it to move

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

If you wanted to lift a heavy box using a lever, then you should ___________.

• move the fulcrum closer to you
• move the fulcrum closer tot the box
• move the fulcrum to the middle
• move the box as far as possible from the fulcrum

Tags

NGSS.MS-ETS1-1

Which inclined plane would require the least amount of effort force?

• A
• B
• C
• D

Tags

NGSS.MS-PS2-2

A ____________ is made of rigid bar and a fulcrum.

• lever
• screw
• pulley
• wheel and axle

An inclined plane wrapped around a cylinder is called a _______.

• pulley

• screw

• wheel and axle

• lever

What unit is used to measure force?

• distance

• Newtons

• meters

• m/s

What unit is used to measure work?

• m/s
• Joules
• Newtons
• meters

Tags

NGSS.MS-PS3-5

How much work is done on an object where a force of 10 Newtons is applied over a distance of 10 meters?

• 20 Joules

• 100 Joules

• 20 Meters

• 0 Joules