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Let vec(v) and vec(a) denote the velocit...

Let `vec(v)` and `vec(a)` denote the velocity and acceleration respectively of a body in one-dimensional motion.

A

`|vecv|`must decrease when `vecalt0`

B

speed must increase when `vecagt0`

C

speed will increase when both `vecv` and `vecá` are lt 0

D

speed will decrease when `vecvlt0` and `vecagt0`

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The correct Answer is:
C,D
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FIITJEE-KINEMATICS-ASSIGNMENT PROBLEMS (OBJECTIVE) LEVEL-II
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  5. Two second after projection, a projectile is travelling in a direction...

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  8. Two particles projected form the same point with same speed u at angle...

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  10. A particle leaves the origin with an initial velocity vecv=3hati m/s a...

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  11. A projectile can have the same range R for two angles of projection. I...

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  16. Let vec(v) and vec(a) denote the velocity and acceleration respectivel...

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  20. The accleration of a particle as seen from two frames S(1) and S(2) ha...

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