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`        From airlift moving upward with a uniform acceleration a barabar to metre per second square and throws a ball vertically upward with velocity V equal to 12 metre per second related to the left the ball comes back to the main after a time to find the value of t find the value of`
2 years ago

Arun
24739 Points
```							Dear student  Take case with respect to the liftUpward velocity with respect to lift vAs lift is moving upward with a accelerationacceleration of ball with respect to the lift = acceleration of the ball – acceleration of lift       =  – g – (a)  =  – (g+a)using s=ut+(1/2)at2as it again comes back to same position with respevt to lift therefore displacement is zero 0 = vt -(1/2)(a+g)t2vt=(1/2)(a+g)t2a+g = 2v/t Now always remember this in this type of questions.Hence2 + 10 = 2 *12/t12 = 24/tt = 2 sec  RegardsArun (askIITians forum expert)
```
2 years ago
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