# JEE Main Physics: Kinematics Quiz Set 1

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| By Tanmay Shankar
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Tanmay Shankar
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Quizzes Created: 491 | Total Attempts: 1,792,595
Questions: 10 | Attempts: 653

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.

• 1.

A.
• 2.

• A.

(X - 5)

• B.

(X - 25)

• C.

(X - 20)

• D.

(X - 40)

B. (X - 25)
• 3.

• A.

5 m/s

• B.

25 m/s

• C.

20 m/s

• D.

40 m/s

C. 20 m/s
• 4.

### An object starts from rest and travels a distance 3D with uniform acceleration, then moves a distance 4D with uniform velocity and finally comes to rest after moving a distance of 5D under uniform retardation. What is the ratio of the average velocity to maximum velocity?

• A.

1/3

• B.

3/5

• C.

4/7

• D.

8/9

B. 3/5
Explanation
The area of velocity â€“ time graph represents the Displacement:

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• 5.

### An object is released from the top of a tower. Which of the following statement is correct about the time taken by the particle in falling through the successive distance of 1 m each?

• A.

All will be equal

• B.
• C.
• D.

None of These

C.
Explanation
Time taken by an object falling under gravity is given by to cover first n meter:Time taken by an object falling under gravity is given by to cover first (n+1) meter: ySo time taken by the object falling under gravity is given by to cover (n + 1)th meter:So the required ratio will be:

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• 6.

### A passenger is standing on the platform. The passenger is standing at the beginning of the fourth coach of a train. How many coaches are there on the train if it takes 6 seconds by the fourth coach and 24 seconds by the rest of the train (including 4th coach) to cross the passenger, then how many coaches are there in the train?

• A.

13

• B.

18

• C.

15

• D.

17

A. 13
Explanation
On solving these two equations we will get n = 13.

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• 7.

### An object starts sliding from the top of a triangular box with a base of 15 inches and a height of 8 inches. The Inclined height of the box is divided into three parts in such a way that the object takes equal times to slide down these parts. What will be the length of these parts?

• A.

15/9, 5, 75/9

• B.

20/9, 60/9, 100/9

• C.

17/9, 51/9, 85/9

• D.

10/9, 30/9, 50/9

A. 15/9, 5, 75/9
• 8.

A.
• 9.

### A heavy stone is dropped into a well in which the water level is at depth H below the ground level. If the speed of the sound is ‘v’ then the time after which the splash is heard will be given by

B.
Explanation
The time in which the sound of splash will be heard is equal to the total of the time taken by the stone to reach the water level & the time taken by the sound to come out of the well

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• 10.

### The height of a container is 1.5 m is being lifted up by a crane, with an acceleration of 2 m/s2. One second after the start, a bolt from the roof of the container starts falling. What will be the displacement of the bolt before touching the floor of the container?

• A.

3/5

• B.

3/8

• C.

2/3

• D.

1/4

D. 1/4
Explanation
From the diagram it is clear that when the ball has reached the floor of the elevator, some upward distance has been travelled by the elevator as well. The ball is falling under gravity whereas the lift has the acceleration ‘a’. The displacement of the ball X = H – X’. The ball is moving in the opposite direction of elevator then the displacement = – X = – (H – X’). At the time of release of ball let the velocity of elevator was v0 and at time T ball touches the floor of the elevator.
For the motion of ball:

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• Current Version
• Jan 31, 2024
Quiz Edited by
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• Aug 05, 2014
Quiz Created by
Tanmay Shankar

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