Power

Power

Multiple Choice

What is the formula for Power?

• P= w x F

• P= Fxd

• P= W/t

• P= mxa

Multiple Choice

What is the unit for Power?

• J

• W

• w

• N

Other Ways we can use the Power Formula: P=W/t

• Work = Power x time. w=Pt

• time = Work/Power . t=W/P

Multiple Choice

Power is defined as the quantity that measures the rate at which _____ is done or energy is transformed.

• energy
• time
• work
• elasticity

Multiple Choice

How much time is needed to produce 720 Joules of work if 90 watts of power is used? 

• 0.125 s
• 8 s
• 64800 s
• 80 s

Multiple Choice

P=25 watts 
W=5000 Joules 
t=???

• 200 sec
• 0.0005 s
• 125000 s
• 125 s

Multiple Choice

Which of the following would produce the most power?

• A mass of 10 kilograms lifted 10 meters in 10 seconds 
• A mass of 10 kilograms lifted 10 meters in 5 seconds
• A mass of 5 kilograms lifted 10 meters in 5 seconds
• A mass of 5 kilograms lifted 5 meters in 10 seconds

Multiple Choice

You move an 8-newton weight five meters in 4 seconds. How much power have you generated?

• 160 watts
• 10 watts
• 6.4 watts
• 17 watts

Multiple Choice

You do 90 joules of work in 30 seconds. How much power have you generated?

• 30 watts
• 3 watts
• 120 watts
• 270 watts

Multiple Choice

Which of these is a measurement of power?

• 100 joules
• 100 watts
• 100 meters per second
• 100 hertz