Work, Power, and Machines
What is the mathematical equation do calculate work?

 
 

What units is work measured in?
 
 

If a tow truck brings a car weighing 900 N a distance of 100 m, how much work is done? (Show your work!)
 
 
 

A 7 kg ball is rolling down a hill with an acceleration of 5 m/s2 for 70 meters.  How much work did gravity do? (Show your work!)
 
 
 
 

What is the mathematical equation to calculate power?
 
 

What units is power measured in?
 
 

How much power did you put into the effort if you are biking with 200 J of work for one minute? (Show your work!)
 
 
 
 

How long would a machine doing 500 J of work have to run to have a power output of 95,000 Watts? (Show your work!)
 
 
 
 


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