A boy standing at the top of a tower of $$20$$ m height drops a stone. Assuming $$g=10$$ m/s2, the velocity with which it hits the ground will be:
1. $$20$$ m/s
2. $$40$$ m/s
3. $$5$$ m/s
4. $$10$$ m/s

Subtopic:  Uniformly Accelerated Motion |
90%
From NCERT
NEET - 2011
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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 |
86%
From NCERT
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A body is thrown upwards and reaches its maximum height. At that position:

 1 its velocity is zero and its acceleration is also zero. 2 its velocity is zero but its acceleration is maximum. 3 its acceleration is minimum. 4 its velocity is zero and its acceleration is the acceleration due to gravity.
Subtopic:  Uniformly Accelerated Motion |
82%
From NCERT
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A ball is thrown vertically downwards with a velocity of $$20$$ m/s from the top of a tower. It hits the ground after some time with the velocity of $$80$$ m/s . The height of the tower is: (assuming $\mathrm{g}=10$ $\mathrm{m}/{\mathrm{s}}^{2}\right)$

 1 $$340$$ m 2 $$320$$ m 3 $$300$$ m 4 $$360$$ m
Subtopic:  Uniformly Accelerated Motion |
82%
From NCERT
NEET - 2020
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A body starting from rest moves with uniform acceleration on a horizontal surface. The body covers 3 consecutive equal distances from the beginning in time ${\mathrm{t}}_{1},$  ${\mathrm{t}}_{3}$ seconds. The ratio of ${\mathrm{t}}_{1}:{\mathrm{t}}_{2}:{\mathrm{t}}_{3}$ is:
1. 1: 2 : 3
2. $1:\sqrt{2}:\sqrt{3}$
3. $1:\left(\sqrt{2}-1\right):\left(\sqrt{3}-\sqrt{2}\right)$
4. $\sqrt{3}:\sqrt{2}:1$

Subtopic:  Uniformly Accelerated Motion |
78%
From NCERT
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A particle starts from rest (with constant acceleration) and acquires velocity 20 m/s in 5s. The distance travelled by the particle in the next 2 s will be:

 1 50 m 2 48 m 3 100 m 4 150 m
Subtopic:  Uniformly Accelerated Motion |
72%
From NCERT
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A stone dropped from a building of height h and reaches the earth after t seconds. From the same building, if two stones are thrown (one upwards and other downwards) with the same velocity u and they reach the earth surface after t1 and t2 seconds respectively, then:

1. $t={t}_{1}-{t}_{2}$

2. $t=\frac{{t}_{1}+{t}_{2}}{2}$

3. $t=\sqrt{{t}_{1}{t}_{2}}$

4. $t={t}_{1}^{2}{t}_{2}^{2}$

Subtopic:  Uniformly Accelerated Motion |
77%
From NCERT
PMT - 1997
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A student is standing at a distance of 50 metres from the bus. As soon as the bus begins its motion with an acceleration of 1 ms–2, the student starts running towards the bus with a uniform velocity u. Assuming the motion to be along a straight road, the minimum value of u, so that the student is able to catch the bus is:

1. 5 ms–1

2. 8 ms–1

3. 10 ms–1

4. 12 ms–1

Subtopic:  Uniformly Accelerated Motion |
73%
From NCERT
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A particle is projected upwards. The times corresponding to height h while ascending and while descending are t1 and t2 respectively. The velocity of projection will be:

1. gt1

2. gt2

3. $g$ $\left({t}_{1}+{t}_{2}\right)$

4. $\frac{g\left({t}_{1}+{t}_{2}\right)}{2}$

Subtopic:  Uniformly Accelerated Motion |
69%
From NCERT
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