Motion Test - 3...

A lift is coming from 8th floor and is just about to reach 4th floor. Taking ground floor as origin and positive direction upwards for all quantities, which one of the following is correct?

The distances travelled by a body starting from rest and travelling with uniform acceleration in successive intervals of time each of one second will be in the ratio:

The figure shows four graphs of displacement ($$x$$) versus time ($$t$$), the graph that shows a constant, positive, and non-zero velocity is:

If north is the positive direction, which situation involves positive velocity and negative acceleration?

A body reaches the ground in $$3\;s$$ when it is released with zero velocity from the top of a building. The height of the building is:

The displacement time graph of a moving particle is shown in the figure. The instantaneous velocity of the particle is negative at the point:

A balloon starts from rest, moves vertically upwards with an acceleration $$\dfrac{g}{8}\ \text{ms}^{-2}$$. A stone falls from the balloon after $$8\ \text{s}$$ from the start. The time taken by the stone to reach the ground  is $$\left(g=9.8\ \text{ms}^{-2}\right)$$:

A pebble is thrown vertically upwards from a bridge with an initial velocity of $$4.9 \;ms^{-1}$$. It strikes the water after $$2\;s$$. Height of the bridge is:

A body thrown vertically upwards reaches the highest point in $$2\;s$$. Initial velocity of projection is_____

A body thrown up with some initial velocity reaches a maximum height of $$50\;m$$. Another body with double the mass thrown up with double the initial velocity will reach a maximum height of :