Solveeit Logo

Question

Question: A 2 kg body falls from infinity to the surface of earth. What will be the kinetic energy of the body...

A 2 kg body falls from infinity to the surface of earth. What will be the kinetic energy of the body on reaching the surface of earth ? (Assume escape velocity to be 104ms–1.)

A

108 J

B

1016 J

C

1020 J

D

1024 J

Answer

1016 J

Explanation

Solution

Kinetic energy = 12\frac { 1 } { 2 }m ve2

= 12\frac { 1 } { 2 }× 2 × 104 × 104 J

= 108 J