What is the average force on the wall?

  • #1
61
0

Homework Statement


A ball hits the wall in a normal direction with v=10m/s. After the hit which lasted 0.2 Seconds, it turned in the same direction with v=10m/S. Knowing that its mass is 0.5 kg, find the average force that hit the wall.

Homework Equations


F=m*a, a= (v-v0)/t

The Attempt at a Solution


a=(0-10)/0.2=-50m/S2, F= 50*0.5= 25N, but the answer is 50N
 

Answers and Replies

  • #2
billy_joule
Science Advisor
1,200
331
What is the final velocity minus the initial velocity? Your calculation assumes the final is zero....
 

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