Work, Energy and Machines

Which of the following is not an example of work?

• an ice hockey puck laying on an ice rink
• ship movement that causes ripples in the water
• a man pushing a heavy box across the floor
• a magnet repelling a compass needle

Tags

NGSS.MS-PS3-5

A wheel is a modification of a(n)

• screw
• lever
• inclined plane
• wedge

Which of the following is not an inclined plane?

• wrench
• axe
• chisel
• ramp

The simple machine that overcomes the limited distance that a resistance can be moved with a lever is the ...

• inclined plane
• screw
• wedge
• wheel and axle

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Name this simple machine. 

• Pulley
• Wheel and Axle
• Inclined Plane
• Lever

Name this simple machine.

• Lever
• Wedge
• Pulley
• Inclined Plane

Name this simple machine. 

• Inclined Plane
• Lever
• Pulley
• Wedge

What are the units for work? 

• newtons
• meters
• force 
• joules 

Each of the men in the illustration is pushing on the box. They each push for 30 seconds but do NOT move the box. The men applied ______ but no ______ was done.

• force, work
• work, force
• motion, force

The ability to cause change is known as?

• Energy

• Electrcitiy

• Fire

• Water