# A ball of mass 0.5 kg moving with a velocity of 2m/s strikes a wall normally and bounces back with the same speed. If the time of contact between the ball and the wall is one millisecond, the average force exerted by the wall on the ball is

Options :
1. 2000N
2. 3000N
3. 5000N
4. None of the above

Explanation:

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