A Girl of Mass 55 Kg Throws a Ball of Mass

Multiple Choice

A girl of mass 55 kg throws a ball of mass 0.80 kg against a wall.The ball strikes the wall horizontally with a speed of $25 \mathrm {~m} / \mathrm { s } \text {, }$ and it bounces back with this same speed.The ball is in contact with the wall $0.050 \mathrm {~s} .$ What is the magnitude of the average force exerted on the wall by the ball?

A) 800 N
B) 400 N
C) 55,000 N
D) 27,500 N
E) 13,750 N