A. 600J
B. 150J
C. 300J
D. 450J

Correct Answer:

Option C – 300J

Explanation

K.E just before hitting the ground
= P.E at the maximum height (conservation of mechanical energy)
K.E = P.E = mgh = 1.5 x 10 x 20
= 300 J

Copyright warnings! Do not copy.