Uniformly Accelerated Motion

Two bodies, (of mass ) and (of mass ) are dropped from heights of and , respectively. The ratio of the time taken by them to reach the ground is:

1.

2.

3.

4.

The distance travelled by a particle starting from rest and moving with an acceleration ms^-2, in the third second is:
1. m
2. m
3. m
4. m

A particle moves in a straight line with a constant acceleration. It changes its velocity from ms^-1 to ms^-1 while covering a distance of m in seconds. The value of is:

1.		2.
3.		4.

A ball is dropped from a high-rise platform at starting from rest. After seconds, another ball is thrown downwards from the same platform with speed . The two balls meet after seconds. What is the value of ?

1.	ms-1	2.	ms-1
3.	ms-1	4.	ms-1

A particle has initial velocity and has acceleration Its speed after s is:
1. units
2. units
3. units
4. units

A boy standing at the top of a tower of 20 m height drops a stone. Assuming 10 ms^-2, the velocity with which it hits the ground is:

1.	20 m/s	2.	40 m/s
3.	5 m/s	4.	10 m/s

A particle has initial velocity and acceleration . The magnitude of velocity after s will be:

1.		2.
3.		4.

A stone falls freely under gravity. It covers distances and in the first seconds, the next seconds and the next seconds respectively. The relation between and is:

1.
2.	and
3.
4.

A person sitting on the ground floor of a building notices through the window, of height , a ball dropped from the roof of the building crosses the window in . What is the velocity of the ball when it is at the topmost point of the window?

1.		2.
3.		4.

A small block slides down on a smooth inclined plane starting from rest at time Let be the distance traveled by the block in the interval to Then the ratio is:

1.		2.
3.		4.

The ratio of the distances travelled by a freely falling body in the ^st, ^nd, ^rd and ^th second is:

1.		2.
3.		4.

A horizontal bridge is built across a river. A student standing on the bridge throws a small ball vertically upwards with a velocity ms^–1. The ball strikes the water surface after s. The height of bridge above water surface is:
(Take )

1.	m	2.	m
3.	m	4.	m