Power is the rate of doing work — energy per second.
Try this
10
P = W / t (W = 1200 J) = 120
Power
Watts (W) = joules per second. At steady speed, power = force × velocity. 1 horsepower ≈ 746 W.
Your turn
A motor does 6000 J of work in 12 s. What is its power output?
Watch out
A kilowatt-hour is energy, not power. 1 kWh = 1000 W × 3600 s = 3.6 million joules — what your electricity bill counts.
Power
1 watt = 1 joule per second. 1 horsepower ≈ 746 W.