A cricket ball hit for six having the bat at angle of 60° to the horizontal with K.E ‘k’. At the top KE of ball is k/n then n =
Physics · Mixed Chapter
JEE Mains

Question

A cricket ball hit for six having the bat at angle of 60° to the horizontal with K.E ‘k’. At the top KE of ball is k/n then n =

G1 Physics · Accepted Answer

Step 1: Initially K=½mu²=k. With projection angle 60°, the horizontal speed is u cos60°=u/2. Step 2: At the highest point the vertical velocity vanishes, so kinetic energy there is ½m(u/2)²=k/4. Step 3: From k/n=k/4, n=4. Answer: 4.