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A force of 1000 N is needed to lift the hook of a crane at a steady velocity. The crane is then used
to lift a load of mass 1000 kg at a velocity of 0.50 m s–1.
How much of the power developed by the motor of the crane is used in lifting the hook and the
load? Assume that the acceleration of free fall g is equal to 10 m s–2.
A 5.0 kW
B 5.5 kW
C 20 kW
D 22 kW
Why is the answer B??
to lift a load of mass 1000 kg at a velocity of 0.50 m s–1.
How much of the power developed by the motor of the crane is used in lifting the hook and the
load? Assume that the acceleration of free fall g is equal to 10 m s–2.
A 5.0 kW
B 5.5 kW
C 20 kW
D 22 kW
Why is the answer B??