A 3 kg ball strikes a heavy rigid wall w...

A 3 kg ball strikes a heavy rigid wall with a speed of `10 m s^(-1)` at an angle of `60^@`. It gets reflected with the same speed and angle as shown in the figure. If the ball is in contact with the wall for 0.2 s, what is the average force exerted on the ball by the wall ?

300 N

zero

`150sqrt3 N`

150 N

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