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# M1 plz help Watch

1. A crane is raising a load of 500 tonnes at a steady rate of 5 cm/s. what power is the engine of the crane producing?
2. (Original post by monika16)
A crane is raising a load of 500 tonnes at a steady rate of 5 cm/s. what power is the engine of the crane producing?

The unit of v is so you have a unit conversion to do. If the load weighs 500 tones, what force is being exerted against gravity?
3. Alternatively, the GPE gained in one second is . And power = work done/time.
This just gives a different way of thinking about it but in reality it is exactly the same as the method shown above.
4. (Original post by Kvothe the arcane)

The unit of v is so you have a unit conversion to do. If the load weighs 500 tones, what force is being exerted against gravity?
To see why both are equivalent: .

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