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shadowice
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[solved]Average force exerted on object by wall
Handball
A 301.0 g handball moving at a speed of 5.3 m/s strikes a wall at an angle of 29.0° to the normal of the wall and then bounces of with the same speed at the same angle. It is in contact with the wall for 0.002 s. What is the average force exerted by the ball on the wall?
m= 3.01kg
v int = 5.3 m/s
v final = -5.3 m/s
theta = 29 deg
time = 0.002s
quick pic i drew of how i set it up
F avg = (Pfinal - P initial)/time
P = m*v
P int = 3.01kg*5.3m/s = 15.953
P final = 3.01kg*-5.3m/s = -15.953
F avg = (-15.953-15.953)/0.002 = -15953 N Lon capa declined this answer is exceptionally large for a tenis ball so i tried to include the angle it gave us.
Pint = -2mvcos29=-27.906
Pfinal = 2mvsin29=15.468
(15.468-27.906)/.002 = -6218.64 which is wrong as well
next i tried (-5.3cos(29)-5.3cos(29)*3.01)/.002 = -9294 N
Handball
A 301.0 g handball moving at a speed of 5.3 m/s strikes a wall at an angle of 29.0° to the normal of the wall and then bounces of with the same speed at the same angle. It is in contact with the wall for 0.002 s. What is the average force exerted by the ball on the wall?
m= 3.01kg
v int = 5.3 m/s
v final = -5.3 m/s
theta = 29 deg
time = 0.002s
quick pic i drew of how i set it up
Homework Equations
F avg = (Pfinal - P initial)/time
P = m*v
The Attempt at a Solution
P int = 3.01kg*5.3m/s = 15.953
P final = 3.01kg*-5.3m/s = -15.953
F avg = (-15.953-15.953)/0.002 = -15953 N Lon capa declined this answer is exceptionally large for a tenis ball so i tried to include the angle it gave us.
Pint = -2mvcos29=-27.906
Pfinal = 2mvsin29=15.468
(15.468-27.906)/.002 = -6218.64 which is wrong as well
next i tried (-5.3cos(29)-5.3cos(29)*3.01)/.002 = -9294 N
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