Motion in a Str...

A boy throws up a ball in a stationary lift and the ball returns to his hands in 10 s. Now if the lift starts moving up at a speed of 5 m/s. The time taken for a ball thrown straight up to return to his hands is:

The displacement of a particle along x-axis is given by x = 4 + 6t + 5t². Its acceleration at t = 2s

On acceleration-time graph, a horizontal line indicates:

The position x of a particle varies with time (t) as x = 3t² – 2t³  .The acceleration of the particle will be zero at time

What does this graph indicate about the motion of an object ?

The dimensions of (change in velocity / time) is

The dimensions of instantaneous acceleration is:

 What does this graph indicate about the motion of an object?

On acceleration-time graph the area under the curve equals the:

If the signs of the velocity and acceleration of a particle are the same, the speed of the particle ______________.