- #1
MattDutra123
- 15
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Homework Statement
A ball of mass 0.075 is traveling horizontally with a speed of 2.20 m/s. It strikes a vertical wall and rebounds horizontally. Due to the collision with the wall, 20% of the ball's initial kinetic energy is dissipated.
Show that the ball rebounds from the wall with a speed of 1.97 m/s.
Homework Equations
Impulse = F*t
Kinetic Energy = 1/2mv2
The Attempt at a Solution
I attempted to use conservation of energy by having the initial kinetic energy (0.075*2.202) be equal to 20% final kinetic energy (0.075*v2*1/5) This gave me a result of 2.2 m/s. I don't know how to reach the desired result of 1.97 m/s.
Apologies in advance for bad formatting.