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For a particle moving along x-axis, spee...

For a particle moving along `x-`axis, speed must be increasing for the following graph `:`

A

B

C

D

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The correct Answer is:
D
For `(1)` `:` For speeding up, signs of `v` and a must be same and for speeding down signs of `v` and a must be opposite.
For `(2)` `:` speed`=`[velocity] `:.` speed first`darr` then `uarr`
For `(3)` & `(4)` `:` speed `=`[slope of `x-t` graph]
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