A tennis ball is dropped on the floor from a height of 20m. It rebounds to a height of 5m. If the ball was in contact with the floor for 0.01s. What w
A tennis ball is dropped on the floor from a height of 20m. It rebounds to a height of 5m. If the ball was in contact with the floor for 0.01s. What was its average acceleration during contact? `(g=10m//s^(2))`
A. 300 `m//s^(2)`
B. `2000 m//s^(2)`
C. `1000 m//s^(2)`
D. `500m//s^(2)`
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Correct Answer - A
`F_("avg")=(msqrt(2+10+10)+msqrt(2xx10xx5))/(0.01)`
`therefore a_("avg")=(10(sqrt(2)+1))/(0.01)=3000m//s^(2)`
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