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Tripling the speed of a motor car multip...

Tripling the speed of a motor car multiplies the distance required for stopping it by

A

2

B

3

C

6

D

9

Text Solution

Verified by Experts

The correct Answer is:
D
We have,
`FxxS = (1)/(2)mv^(2)`
`Spropv^(2)`
When v is trippled, S becomes 9 times.
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