Question

A machine raises a load of 100 kg to a height of 15 m in 5 s. Find (i) the energy spent by the machine

Answer 1

Answer:

Given,

m = 100kg = 100 × 1000 g = 100000g

h = 15 m

t = 5 s

v = h/t

= 15/5 m/s

= 3 m/s

energy spent = 1/2 mv^2

= 1/2 × 100000 × 9 J

= 450000 J

Hope this helps.