A 3 kg ball strikes a heavy rigid will with a speed of 10 m/s at an angle of 60". It gets reflected with the same speed and angle as shown in fig. If theball is in contact with the wall for0.20 s, what is the average force exerted on the ball by the wall ?

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zero

150 N

150â3 N

300 N

answer is C.

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Detailed Solution

We know that F=Îp/ÎtHere Îp=2mvsinâ¡Î¸=2Ã3Ã10sinâ¡60â =60Ã(3/2)=303Given that Ît=0.2sâ´F=3030â2=1503.

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