Question

An energy of 4kJ causes a displacement of 64 m in 2.5s.the power delivered is

Answer 1

Energy = 4 X 1000 = 4000 J
Energy = Power X Time
4000 = Power X 2.5
Power = 1600 W

Answer 2

Given :

Energy , E = 4 kJ = 4000 J .

Displacement , d = 64 m .

Time taken , t = 2.5 s .

To Find :

The power delivered .

Solution :

We know , power delivered is the ratio of Energy to the time taken .

So ,

$P=\dfrac{E}{t}\\\\P=\dfrac{4000\ J}{2.5\ s}\\\\P=1600\ W$

Therefore , power delivered in time 2.5 s is 1600 W .

Hence , this is the required solution .