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A person standing on the floor of an elevator drops a coin. The coin reaches the floor in time ${t}_{1}$ if the elevator is moving uniformly and time ${t}_{2}$ 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: Â Relative Motion in One Dimension |

Â 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 \(v_2\) ${\mathrm{}}_{}$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: Â Average Speed & Average Velocity |

Â 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: Â Uniformly Accelerated Motion |

Â 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: Â Uniformly Accelerated Motion |

Â 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: Â Uniformly Accelerated Motion |

Â 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: Â Graphs |

Â 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: Â Uniformly Accelerated Motion |

Â 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/s^{2})

1. | \(120\) m | 2. | \(140\) m |

3. | \(80\) m | 4. | \(100\) m |

Subtopic: Â Uniformly Accelerated Motion |

Â 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: Â Graphs |

Â 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: Â Graphs |

Â 79%

From NCERT

NEET - 2022

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