A person standing on the floor of an elevator drops a coin. The coin reaches the floor in time t1 if the elevator is moving uniformly and time t2 if the elevator is stationary. Then:

1. \(t_1<t_2 \) or \(t_1>t_2 \) depending upon whether the lift is going up or down.
2. \(t_1<t_2 \)
3. \(t_1>t_2 \)
4. \(t_1=t_2 \)

Subtopic:  Relative Motion in One Dimension |
 52%
From NCERT
NEET - 2019
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A person travelling in a straight line moves with a constant velocity \(v_1\) for a certain distance \(x\) and with a constant velocity \(v_2\) for the next equal distance. The average velocity \(v\) is given by the relation:

1. \(\frac{1}{v} = \frac{1}{v_1}+\frac{1}{v_2}\) 2. \(\frac{2}{v} = \frac{1}{v_1}+\frac{1}{v_2}\)
3. \(\frac{v}{2} = \frac{v_1+v_2}{2}\) 4. \(v = \sqrt{v_1v_2}\)

Subtopic:  Average Speed & Average Velocity |
 77%
From NCERT
NEET - 2019
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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 \(g = 10~\text{m/s}^2)\)

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 person sitting on the ground floor of a building notices through the window, of height \(1.5~\text{m}\), a ball dropped from the roof of the building crosses the window in \(0.1~\text{s}\). What is the velocity of the ball when it is at the topmost point of the window? \(\left(g = 10~\text{m/s}^2\right )\)

1. \(15.5~\text{m/s}\) 2. \(14.5~\text{m/s}\)
3. \(4.5~\text{m/s}\)  4. \(20~\text{m/s}\)
Subtopic:  Uniformly Accelerated Motion |
 63%
From NCERT
NEET - 2020
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A small block slides down on a smooth inclined plane starting from rest at time \(t=0.\) Let \(S_n\) be the distance traveled by the block in the interval \(t=n-1\) to \(t=n.\) Then the ratio \(\dfrac{S_n}{S_{n +1}}\) is:

1. \(\dfrac{2n+1}{2n-1}\) 2. \(\dfrac{2n}{2n-1}\)
3. \(\dfrac{2n-1}{2n}\) 4. \(\dfrac{2n-1}{2n+1}\)
Subtopic:  Uniformly Accelerated Motion |
 57%
From NCERT
NEET - 2021
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The displacement-time \((s\text-t)\) graphs of two moving particles \(A~\text{and}~B\) make angles of \(30^\circ\) and \(45^\circ\) with the \(x\text-\)axis as shown in the figure. The ratio of their respective velocity \(\left(\dfrac{v_A}{v_B}\right) \) is:
                  
1. \(1: \sqrt{3}\) 2. \(\sqrt{3}: 1\)
3. \(1:1\) 4.    \(1:2\)
Subtopic:  Graphs |
 71%
From NCERT
NEET - 2022
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The ratio of the distances travelled by a freely falling body in the \(1\)st, \(2\)nd, \(3\)rd and \(4\)th second is:
1. \(1:1:1:1\) 2. \(1:2:3:4\)
3. \(1:4:9:16\) 4. \(1:3:5:7\)
Subtopic:  Uniformly Accelerated Motion |
 80%
From NCERT
NEET - 2022
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A stone is thrown vertically downwards with an initial velocity of \(40\) m/s from the top of a building. If it reaches the ground with a velocity of \(60\) m/s, then the height of the building is: (Take \(g=10\) m/s2)

1. \(120\) m 2. \(140\) m
3. \(80\) m 4. \(100\) m
Subtopic:  Uniformly Accelerated Motion |
 82%
From NCERT
NEET - 2022
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The figure given below shows the displacement and time, \((x\text -t)\) graph of a particle moving along a straight line:
           
The correct statement, about the motion of the particle, is:

1. the particle moves at a constant velocity up to a time \(t_0\) and then stops.
2. the particle is accelerated throughout its motion.
3. the particle is accelerated continuously for time \(t_0\) then moves with constant velocity.
4. the particle is at rest.

Subtopic:  Graphs |
 74%
From NCERT
NEET - 2022
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The position-time \((x\text-t)\) graph for positive acceleration is:
1. 2.
3. 4.
Subtopic:  Graphs |
 79%
From NCERT
NEET - 2022
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