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CBSE Class 11-science Answered

find the answer to the following question
Asked by | 25 Jun, 2008, 09:32: AM
answered-by-expert Expert Answer

Let the initial velocity(modulas) be u and final velocity be v.

Now vx=ucos30

vy=usin30-gt

Angle at which ball strikes=45

Now tan45=-vy/vx

Hence vy=vx

or ucos30=-usin30+5g

or u=50/(sin30+cos30)=36.6 ms-1

h=|usin30(5)-0.5(10)(25)|=|125/(sin30+cos30)-125|=33.5 m

Answered by | 06 Aug, 2008, 07:03: PM

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