1. The problem statement, all variables and given/known data a 8kg steel ball strikes a wall with a speed of 11.7 m/s at an angle of 35.3 degrees with the normal to the wall. it bounces off with the same speed and angle as shown in the picture. http://img405.imageshack.us/img405/7733/asdfkf7.jpg [Broken] If the ball is in contact with the wall for 0.297 seconds, what is the magnitude of the average force exerted on the ball by the wall? Answer in N 2. Relevant equations 3. The attempt at a solution Ft = mv F(0.297) = 8 * 11.7 F = 315.15 kg* m/s^2 or N but thats if its a linear problem Angle wise Horizontal speed of 11.7 m/s Cos 35.3 = x / 11.7 x = 9.549 m/s Extra info Vertical speed of 11.7 m/s sin 35.3 = y / 11.7 y = 6.761 m/s Ft = mv F(0.297) = 8 * 9.549 m/s F = 257.2069 N is that right?