Question

if the crane lifts a load of 1000kg to the height of 15 cm in 30 second calculate it's work done and power​

Answer 1

PLEASE MAKE ME THE BRILLIANT

Answer 2

Given:

mass = 1000kg

height = 15cm = 15/100m = 0.15m

time = 30seconds

 To find,

      Work done = P.E.= m*g*h

here m= mass, g= acceleration due to gravity(9.8m/s2 at the surface of the earth) and h= height in meters.

      work done = 1000*9.8*0.15

                         =1470JOULES

         Power = work done/time

                     = 1470/30

                     = 49 WATTS