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Ankit Shukla Grade:
        

A particle is projected ...at that time its kinetic energy was KE1......and at the top point where vertical velocity is 0 its kinetic energy was KE2 .......


The ratio of KE2 : KE1 is 3:4 ........ find the difference in their velocities ......

7 years ago

Answers : (1)

Badiuddin askIITians.ismu Expert
147 Points
										

Dear ankit


let velocity at the begineeing ii u and angle of projection is θ.


KE1 =1/2 mu2


KE2 =1/2 m(ucosθ)2


given


KE2 : KE1 is 3:4


so cos2θ  =3/4


θ =30


difference in their velocity =u-ucosθ


                                     =u-u√3/2


                                     =u(1-√3/2)






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Badiuddin

7 years ago
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