Two electric motors are used to lift a 2N weight through a vertical height of 10m. 

Motor one does this in 5 seconds.

Motor two does this in 10 seconds. 

What is the power rating of each motor? 

A hairdryer transfers 48,000 J of energy in one minute. What is the power rating of the hairdryer? 

How many kW are there in 5000W? 

What is a Watt of power (1W) ? 

Which of these formula for Power is correct?