Gravity Force applied

Classical Mechanics Level 4

A mass of 100 g strikes the wall, from left, with a speed of 5 m/s making an angle of 60 degree from the horizontal.

And rebounds with the same speed. The contact time is \[2\times 10^{-3} seconds.\]

Then what is the force applied by the wall?

Thanks @Caleb Townsend for correcting me!


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