A ball of mass $200 g$ is thrown horizontally with a speed of $20{\text{ }}m{\text{ }}{s^{ - 1}}$ against a vertical wall.
The ball is in contact with the wall for a time of $0.10 s$ before rebounding back along its original path with a speed of $10{\text{ }}m{\text{ }}{s^{ - 1}}$.
What is the average force exerted by the wall on the ball during the collision?
1 )
$20 N$
$60 N$
3 )
$20 kN$
4 )
$60 kN$
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