Physical Science Chapter 14 Review

How much work is produced when 350 N is used to move a car 5 m (W=Fd)?

• 70 J
• 1750 J
• 355 J
• 175 J

What is a machine?

• an object that has AI

• an object that is designed to take over the earth in 2020

• a device that changes force

• a mechanism that is used to decrease the amount of work done

Identify this simple machine

• Lever
• Wheel & Axle
• Inclined Plane
• Screw

Two examples of a pulley...

• knife & axe blade
• lightbulb & screw
• flagpole hoist & window blinds
• catapult & teeter totter

Which of the following does a simple machine do?

• allows the users to apply less force over a longer distance
• reduce the amount of force needed to do work
• change the direction of the applied force
• all of the above

A seesaw is an example of a  

• wedge
• lever 
• inclined plane 
• pulley 

Stairs

• wedge
• pulley
• inclined plane
• wheel and axle

Tags

NGSS.MS-ETS1-1

Name this simple machine. 

• Wheel and Axle
• Lever
• Pulley
• Wedge

What is the unit of power?

• newton

• watt

• meter

• joule

If you exert a force of 10.0 N to lift a box a distance of 3 m, how much work do you do?

• 30J

• 300 J

• 90 J

• 900 J