1.

The position x of a particle varies with time t as x = at^(2) -bt^(3). For what value of time acceleration is zero?

Answer»

`(2a)/(3B)`
`a//b`
`(a)/(3b)`
zero

Solution :Here `x=at^(2)-BT^(3)`
`v=(dx)/(dt)=2at-3bt^(2)`
ACCELERATION =`F=(dv)/(dt)=2a-6bt`
Now when f=0
2a-6bt=0
`2a=6bt` or `t=(a)/(3b)`


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