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 = 21m ve2
= 21× 2 × 104 × 104 J
= 108 J