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A block is moved on a straight line with...

A block is moved on a straight line with a speed of `5m^(-1)` towards a wall laying 20m away. After collision with wall, block retraces the path with a speed of `4ms^(-1)`. What is the average velocity of block during the time interval 0 to 6 sec?

A

Zero

B

`2ms^(-1)`

C

`4ms^(-1)`

D

`5ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
`lt Vgt =(20-8)/(6)=(12)/(6)`
`lt V gt =2`
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