A cricket ball is hit at 300 to the horizontal with a kinetic energy, K The kinetic energy at - Science - Work and Energy

Question

A cricket ball is hit at 300 to the horizontal with a kinetic
energy, K The kinetic energy at the highest point is:A] KB](K
root3)/2C] K/2D] 3K/4

Aditi · Accepted Answer

Let, u be the initial velocity So, initial kinetic energy is, K
= (1/2)mu2
At the maximum height, velocity is u cos30 =
(√3×u/2)
Therefore, kinetic energy at the maximum height is, KE
f = (1/2)m(√3×u/2) 2 = (3/4)K

hence option (D) is correct

A cricket ball is hit at 300 to the horizontal with a kinetic energy, K. The kinetic energy at the highest point is:A] KB](K root3)/2C] K/2D] 3K/4