A 2.5 kg ball strikes a wall with a velocity of 8.5m/s to the left. The ball bounces off with a velocity of 7.5 m/s to the right. If the ball is in contact with the wall for 0.25 s , what is the constant force exerted on the ball by the wall?

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Answer 1 · 2016-09-13T15:54:08

Given

#m->"Mass of the ball"=2.5kg#

#u->"Initial velocity of the ball towards left"#
#=-8.5m/s" taking left direction negative"#

#v->"Final velocity of the ball towards right"#
#=+7.5m/s#

#t->"Duration of force exererted by the wall"=0.25s#

#F->"Force"=(m(v-u))/t=(2.5(7.5+8.5))/0.25=160N#