Physical Science, Chapter 14, Work, Power and Machines Review

Which is an example of someone using a simple machine to do work?

• a boy runs across a football field
• a banker counts money
• a mother pushes a stroller up a ramp
• a girl eats a sandwich

Work done = Force x _________

• distance
• acceleration
• velocity
• speed

A force exerted over a distance to move an object is defined as the ______________________.

• power
• work
• momentum
• Watt

The unit used to measure energy is 

• Watt
• Newton
• Joule 
• meter

Tags

NGSS.MS-PS3-4

A person applies a force to a wall. 

•   Work is done because the person uses energy when applying the force  
• Work is done because the wall heats up at the place where the force is applied  
• No work is done

A boy pushes on a parked car with a force of 200 N. The car does not move. How much work does the boy do on the car?

• 200N
• 200J
• 0J
• 0N

A flat sloping surface that connects lower and higher elevations. It makes raising objects easier

• wedge
• screw
• lever
• inclined plane

Tags

NGSS.MS-PS2-2

Two inclined planes placed back to back forms this simple machine 

• pulley
• wedge
• lever
• wheel and axle

A simple machine that consists a rigid bar that pivot about a fixed point

• lever
• pulley
• wheel and axle
• fulcrum

A flagpole is an example of

• wedge
• pulley
• incline plane
• wheel and axle