Question

An object of mass 20 kg is dropped from height 20m

Answer 1

Explanation:

478.ajective to kg se e.jak10

Answer 2

Answer:

4000 J

Explanation:

Full Question:

A body of mass 20kg is drop from a height of 20m above the ground. Calculate the kinetic energy at the moment when it strikes the ground.

Solution:

Velocity:

Velocity is a vector expression of the displacement that an object or particle undergoes with respect to time.

------------------------------

The velocity by which it strike the ground is (2gh)^1/2

V = (2×10×20)^1/2

V = 20m/s

Now,

Calculate Kinetic energy,

Kinetic energy =1/2 mv^2

1/2.20.20.20

4000J                             (Answer)