Question

a body of mass 10 kg is dropped from a height 20 m
A) find it's potential energy before it is dropped
B) find it's kinetic energy when it is 8.0 m above the ground​

Answer 1

Answer:

a) Potential energy=mgh=10×9.8×20=1960

b) Energy is nor created nor destroyed.

kinetic energy+potential energy=constant

k.e+mgh=1960

k.e+10(9.8)(8)=1960

k.e+784=1960

k.e=1960-784=1176