Power

Question 1

What is power?

Answer 1

Power is the amount of energy transferred each second.

Question 2

What is power measured in?

Answer 2

Watts (W)

Question 3

What is the equation to calculate power?

Answer 3

Power (W) = Work done (J) / Time (s)

Question 4

Engine A transfers 225J electrically in 45s. How powerful is it?

Answer 4

Power = 225J / 45s = 5W

Question 5

Convert all of these to J:
a) 1KJ
b) 1MJ
c) 1GJ

Answer 5

a) 1,000J
b) 1,000,000J
c) 1,000,000,000