Energy, Work, and Power Review

How do you calculate power?

• P = W/t
• P = E/t
• P = w * t
• P = bbq/chicken

How do we calculate work?

• W = F * d
• w = f * D
• W = F * D
• w = f * d

How much work is being done with 200 N of force over 426 meters?

• 85,200 J
• 45,620 J
• 90,480 J
• 62,329 J

The SI unit of work is?

• Joules
• Watts
• Newtons
• meters

The SI unit for power is...?

• Watts
• Joules
• Newtons
• Meters

• A is Potential, B is Kinetic
• A is Kinetic, B is Potential
• A is Power, B is Work
• A is Work, B is Power

As the skier goes down the hill, ________ energy increases while _______ energy decreases.

• Gravitational; Kinetic
• Kinetic; Gravitational
• Elastic; Kinetic
• Kinetic; Elastic

A 24 Newton force was used to push a crate a distance of 4 meters. Calculate the work done on the crate.

• 6 Joules
• 28 Joules
• 96 Joules
• 60 Joules

Bro A bench presses 145-lbs five times in 20 seconds.
Bro B bench presses 145-lbs five times in 10 seconds.

• Bro A has more power
• Bro B has more power
• Both Bros have the same power
• Bro

A motor does 6,800 Joules of work raising an injured man off of Camelback Mountain onto a helicopter. The average power of the motor during the airlift was 750W. How long did it take to airlift the patient?

• 0.110 seconds
• 7.5 seconds
• 9.07 seconds
• 11.1 seconds