From the top of a tower, a particle is thrown vertically downwards with a velocity of 10 m/s. The ratio of the distances, covered by it in the 3^rd and 2^nd seconds of the motion is (Take $g=10m/s^2$) 

1. 5 : 7  

2. 7 : 5

3. 3 : 6

4. 6 : 3

Two balls A and B of same masses are thrown from the top of the building. A, thrown upward with velocity v and B, thrown downward with velocity v, then 

(1) Velocity of A is more than B at the ground

(2) Velocity of B is more than A at the ground

(3) Both A & B strike the ground with same velocity

(4) None of these

A cricket ball is thrown up with a speed of 19.6 ms^–1. The maximum height it can reach is:

(1) 9.8 m

(2) 19.6 m

(3) 29.4 m

(4) 39.2 m

A very large number of balls are thrown vertically upwards in quick succession in such a way that the next ball is thrown when the previous one is at the maximum height. If the maximum height is 5m, the number of ball thrown per minute is (take $g=10m{s}^{-2}$) 

(1) 120

(2) 80

(3) 60

(4) 40

A body falling from a high Minaret travels 40 meters in the last 2 seconds of its fall to ground. Height of Minaret in meters is (take $g=10m{s}^{-2}$) 

(1) 60

(2) 45

(3) 80

(4) 50

A body falls from a height $h=200m$ (at New Delhi). The ratio of distance travelled in each 2 sec during t = 0 to t = 6 second of the journey is 

(1) 1 : 4 : 9

(2) 1 : 2 : 4

(3) 1 : 3 : 5

(4) 1 : 2 : 3

A man drops a ball downside from the roof of a tower of height 400 meters. At the same time another ball is thrown upside with a velocity 50 meter/sec. from the surface of the tower, then they will meet at which height from the surface of the tower 

(1) 100 meters

(2) 320 meters

(3) 80 meters

(4) 240 meters

Two balls are dropped from heights h and 2h respectively from the earth surface. The ratio of time of these balls to reach the earth is 

(1) $1:\sqrt{2}$

(2) $\sqrt{2}$ : 1

(3) 2 : 1

(4) 1 : 4

The acceleration due to gravity on the planet A is 9 times the acceleration due to gravity on planet B. A man jumps to a height of 2m on the surface of A. What is the height of jump by the same person on the planet B 

(1) 18m

(2) 6m

(3) $\frac{2}{3}m$

(4) $\frac{2}{9}m$

A body falls from rest in the gravitational field of the earth. The distance travelled in the fifth second of its motion is $(g=10m/s^2)$ 

(1) 25m

(2) 45m

(3) 90m

(4) 125m