- #1
AnkhUNC
- 91
- 0
[SOLVED] Another use for a tennis ball
To test the quality of a tennis ball, you drop it onto the floor from a height of 4.93 m. It rebounds to a height of 2.68 m. If the ball is in contact with the floor for 12.3 ms, what is its average acceleration during that contact?
v1 = -sqrt(-2(g)(4.93m)) = -9.83 m/s
v2 = sqrt(2(g)(-2.68+4.93)) = 6.64 m/s
Average acel = v2-v1/delta time = (6.64-(-9.83))/12.3x10^(-3)ms = 1.34 m/s^2?
The answer isn't correct but I have no idea where I'm going wrong.
Homework Statement
To test the quality of a tennis ball, you drop it onto the floor from a height of 4.93 m. It rebounds to a height of 2.68 m. If the ball is in contact with the floor for 12.3 ms, what is its average acceleration during that contact?
Homework Equations
The Attempt at a Solution
v1 = -sqrt(-2(g)(4.93m)) = -9.83 m/s
v2 = sqrt(2(g)(-2.68+4.93)) = 6.64 m/s
Average acel = v2-v1/delta time = (6.64-(-9.83))/12.3x10^(-3)ms = 1.34 m/s^2?
The answer isn't correct but I have no idea where I'm going wrong.