5.1 and 5.2 Review

What unit do we use to measure work?

• joule (J)

• watt (W)

• percent (%)

What unit do we use to measure power?

• joule (J)

• watt (W)

• percent (%)

What is the relationship between work and power?

• Work is how much power you do in a certain amount of time.

• Power is how much work you do in a certain amount of time.

What pieces of information do you need to calculate work done on an object?

• force applied

• time taken

• distance traveled

• mass of object

If Mr. Austin holds their Chromebook stationary for an hour, have they done work?

• Yes

• No

You push an object with a force of 25 N over a distance of 10 m. What work do you do on the object?

• 250 J

• 2.5 J

• 35 J

Which of the following equations are correctly solved versions of the work equation?

• 
  

  $F=W\cdot d$
  

• $F=\frac{W}{d}$

• $d=\frac{W}{F}$

• $d=W\cdot F$

Which of the following is a correctly solved version of the power equation?

• 
  

  $W\ =\ P\cdot t$
  

• $W=\frac{P}{t}$

• $W=\frac{t}{P}$

What is a measure of how much your machine multiplies your input force by?

• Mechanical Advantage

• Efficiency

• Input Force

What is a measure of how much input work your machine converts to output work?

• Mechanical Advantage

• Efficiency

• Input Force