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The position of an object moving along x...

The position of an object moving along x-axis is given by x`=a+bt^(2)` where a =8.5 m, b=2.5 `ms^(-2)` and t is measured in seconds.Then which of the following is true ?

A

Velocity at `t=2` sec is zero

B

average velocity between `t=2, t=4` sec is `15m//s`

C

velocity at `t=4` sec is `10m//s`

D

all the above are true

Text Solution

Verified by Experts

The correct Answer is:
B
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