A balloon starts rising from the ground with an acceleration of 1.25 m/s2 . After 8s, a stone is released from the balloon. The stone will (g = 10 m/s2

(1) Reach the ground in 4 second

(2) Begin to move down after being released

(3) Have a displacement of 50 m

(4) Cover a distance of 40 m in reaching the ground

Subtopic:  Uniformly Accelerated Motion |
From NCERT
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A body is thrown vertically upwards with a velocity u. Find the true statement from the following:

(1) Both velocity and acceleration are zero at its highest point

(2) Velocity is maximum and acceleration is zero at the highest point

(3) Velocity is maximum and acceleration is g downwards at its highest point

(4) Velocity is zero at the highest point and maximum height reached is u2/2g

Subtopic:  Uniformly Accelerated Motion |
 87%
From NCERT
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A man throws a ball vertically upward and it rises through 20 m and returns to his hands. What was the initial velocity (u) of the ball and for how much time (T) it remained in the air [g=10m/s2] 

(1) u = 10 m/s, T = 2s

(2) u = 10 m/s, T = 4s

(3) u = 20 m/s, T = 2s

(4) u = 20 m/s, T = 4s

Subtopic:  Uniformly Accelerated Motion |
 67%
From NCERT
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A particle when thrown moves such that it passes from the same height at 2 sec and 10 sec, the height is:

(1) g

(2) 2g

(3) 5g

(4) 10g

Subtopic:  Uniformly Accelerated Motion |
 58%
From NCERT
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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 3rd and 2nd seconds of the motion is (Take g=10m/s2

1. 5 : 7  

2. 7 : 5

3. 3 : 6

4. 6 : 3

Subtopic:  Uniformly Accelerated Motion |
 81%
AIIMS - 2000
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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

Subtopic:  Uniformly Accelerated Motion |
 77%
From NCERT
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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

Subtopic:  Uniformly Accelerated Motion |
 89%
From NCERT
PMT - 2002
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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=10ms2

(1) 120

(2) 80

(3) 60

(4) 40

Subtopic:  Uniformly Accelerated Motion |
 73%
From NCERT
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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=10ms2

(1) 60

(2) 45

(3) 80

(4) 50

Subtopic:  Uniformly Accelerated Motion |
 71%
From NCERT
PMT - 2002
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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

Subtopic:  Uniformly Accelerated Motion |
 79%
From NCERT
PMT - 2004
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