A body starts to fall freely under gravity. The distances covered by it in the first, second and third second will be in the ratio: 

1. \(1:3:5\) 2. \(1:2:3\)
3. \(1:4:9\) 4. \(1:5:6\)

Subtopic:  Uniformly Accelerated Motion |
 87%
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P, Q and R are three balloons ascending with velocities U, 4U and 8U respectively. If stones of the same mass be dropped from each, when they are at the same height, then 

(1) They reach the ground at the same time

(2) Stone from P reaches the ground first

(3) Stone from R reaches the ground first

(4) Stone from Q reaches the ground first

Subtopic:  Uniformly Accelerated Motion |
 50%
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A body is projected up with a speed \(u\) and the time taken by it is \(T\) to reach the maximum height \(H\). Pick out the correct statement.
1. It reaches \(\frac{H}{2}\) in \(\frac{T}{2}\) sec
2. It acquires velocity \(\frac{u}{2}\) in \(\frac{T}{2}\)
3. Its velocity is \(\frac{u}{2}\) at \(\frac{H}{2}\)
4. Same velocity at \(2T\)
Subtopic:  Uniformly Accelerated Motion |
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A body falling for 2 seconds covers a distance S equal to that covered in next second. Taking g=10m/s2,S=

(1) 30 m

(2) 10 m

(3) 60 m

(4) 20 m

Subtopic:  Uniformly Accelerated Motion |
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A body dropped from a height h with an initial speed of zero, strikes the ground with a velocity 3km/h. Another body of the same mass is dropped from the same height h with an initial speed u'=4km/h. Find the final velocity of the second body with which it strikes the ground.

(1) 3 km/h

(2) 4 km/h

(3) 5 km/h

(4) 12 km/h

Subtopic:  Uniformly Accelerated Motion |
 75%
From NCERT
PMT - 1996
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A ball of mass m1 and another ball of mass m2 are dropped from equal height. If time taken by the balls are t1 and t2 respectively, then 

1. t1=t22

2. t1=t2

3. t1=4t2

4. t1=t24 

Subtopic:  Uniformly Accelerated Motion |
 91%
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With what velocity a ball be projected vertically so that the distance covered by it in 5th second is twice the distance it covers in its 6th second (g=10m/s2) 

(1) 58.8 m/s

(2) 49 m/s

(3) 65 m/s

(4) 19.6 m/s

Subtopic:  Uniformly Accelerated Motion |
 72%
From NCERT
PMT - 1997
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A ball is dropped downwards. After 1 second another ball is dropped downwards from the same point. What is the distance between them after 3 seconds 

1.  25 m
2.  20 m
3.  50 m
4.  9.8 m

Subtopic:  Uniformly Accelerated Motion |
 73%
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A stone is thrown with an initial speed of 4.9 m/s from a bridge in vertically upward direction. It falls down in water after 2 sec. The height of the bridge is 

(1) 4.9 m

(2) 9.8 m

(3) 19.8 m

(4) 24.7 m

Subtopic:  Uniformly Accelerated Motion |
 70%
From NCERT
PMT - 2003
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A stone is shot straight upward with a speed of 20 m/sec from a tower 200 m high. The speed with which it strikes the ground is approximately 

(1) 60 m/sec

(2) 65 m/sec

(3) 70 m/sec

(4) 75 m/sec

Subtopic:  Uniformly Accelerated Motion |
 66%
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