Power

Question 1

Formula?

Answer 1

P = energy ➗ time

Question 2

Unit?

Answer 2

Watts = joules ➗ seconds

Question 3

An elevator uses 50,000J of energy in exactly 1 minute. How much power is needed for the electrical trip?

Answer 3

P = energy/time
P = 50,000 ➗ 60
P = 833.3W

Question 4

If the lawn mower uses 240,000J of energy in 120 seconds. What is the power of the electric lawn mower?

Answer 4

P = energy/time
P = 240,000 ➗ 120
P = 2,000W