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CBSE Class 11-science Answered

A body of mass m is projected with initial speed u at an angle theta with the horizontal what will be the change in momentum of body after time t??
Asked by | 27 Aug, 2012, 09:23: PM
answered-by-expert Expert Answer
in the horizontal direction there will not be any change in velocity as there is no force acting....it will remain u cos ?
in vertical direction the final velocity after time t sec:
v=usin?-gt
so after t sec the horizontal comp of vel=u cos ?
so after t sec the vertical comp of vel=usin?-gt
so the final velocity=?(u 2cos ?+(usin?-gt)2)
solve and reduce and then find the final momentum.
and find the change in momentum.
 
Answered by | 28 Aug, 2012, 10:30: AM

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