(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

http://img100.imageshack.us/img100/1867/physicsp25wz8.png [Broken]

Use data from Figure to determine,

(a) the distance travelled by the ball during the first 0.40s,

(b) the change in momentum of the ball, of mass 45g, during contact of the ball with the surface,

(c) the average force acting on the ball during contact with the surface.

2. Relevant equations

3. The attempt at a solution

(a) 0.8m

(b) [tex]Change \ in \ momentum = mv - mu[/tex]

[tex]= (45 \times 10^{-3} \times 4.2) - (45 \times 10^{-3} \times 0)[/tex]

[tex]= 0.19Ns[/tex]

Answer in text book is [tex]0.35Ns[/tex], where did I go wrong?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Average Forces Question

**Physics Forums | Science Articles, Homework Help, Discussion**