Answer:
The power used by the crane = 2548 W
Explanation:
Power: Power can be defined as the rate at which energy is dissipated or expended. The S.I of power is Watt (W). It can be express mathematically as,
Power (P) = Energy/time......................................... Equation 1
But, Energy = mgh..................................................... Equation 2
Where m = mass of the body, g = acceleration due to gravity, h = height.
Given:m = 130 kg, h = 10 m
Constant: g = 9.8 m/s²
Substituting these values into equation 2
Energy = 130×10×9.8
Energy = 12740 J.
Also Given: t = 5 s
Substituting these values into equation 1
Power = 12740/5
Power = 2548 W
Therefore the power used by the crane = 2548 W
