Work, Power and Simple Machines

What is the unit used to measure Power?

• Joule
• Watt
• Newton
• Pascal

Force X Distance = _______?

• Work
• Power
• Energy
• Force

In which of these cases is work being done? 

• A student sleeps
• A student pushes a locked door that does not move
• a student carries his chair into another room
• A student sits on the carpet

A _____ is a fixed bar  that us free to move around a fixed point known as a fulcrum.

• pulley
• inclined plane
• lever

If you use a crowbar to get the lid off of a bucket, what simple machine are you using?

• Inclined Plane
• Pulley
• Wheel and Axle
• Lever

What type of simple machine is found on the cap of a pickle jar?

• lever
• inclined plane
• pulley
• screw

Which of these is an example of a wedge?

• skateboard
• broom
• stairs
• butter knife

Consists of two circular objects; a central shaft and a wheel.

• wheel and axle
• screw
• pulley

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Work/Time = ________?

• Force
• Speed
• Velocity
• Power

What is work?

• A push or pull.
• When the object moves in the same direction in which the force is exerted.
• A change in energy.
• The rate at which energy is transferred.

Tags

NGSS.MS-PS3-5