Answer:
65 N
Explanation:
Assuming that the ball was at rest hence initial momentum = 0
Final momentum = mv = 1Kg × 13 ms-1 = 13 kgms-1
But
Ft= mv according to Newton's law
F= mv/t
F= 13kgms-1/0.2s
F= 65 N
Use Fnet*t=p
Fnet=mv2-mv1÷t
Fnet=3(12)-3(0)÷1.5
Fnet=36÷1.5
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