Q. A balloon is rising up at 30 m/s and a stone is released from it, when it is at a height 80 m above ground. Find the time after which stone will hit the ground.

Level 2

Kinematics

1D 3D2D

Distance

Displacement

Speed

Velocity

Acceleration

Horizontal Motion

Vertical Motion

Vertical Motion

JEE Mains / Advanced / NEET / AIIMS

Q1. A particle is thrown vertically upward at 10 m/s. Find out :

1. its velocity after 1 second.2. its velocity after 2 seconds.3. its acceleration at the maximum height.4. its velocity at the maximum height.5. displacement during first 2 seconds.6. maximum height7. time of ascent8. time of descent9. displacement in the last second.10. Displacement in first 3 seconds. (Take g = 10 m/s 2 )

Level 1

Solution:

Q2. A stone falls from a balloon that is descending at a uniform rate of 12 m/s. The displacement of the stone from the point of release after 10 seconds is

Level 1

Solution:

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Q3. The acceleration due to gravity on the planet A is 9 times the acceleration due to gravity on planet B. A man jumps to a height of 2m on the surface of A. What is the height of jump by the same person on the planet B

Level 1

Solution:

Q4. When a ball is thrown up vertically with velocity Vo , it reaches a maximum height of ‘h’. If one wishes to triple the maximum height then the ball should be thrown with velocity

Level 1

Solution:

Q5. A person standing near the edge of the top of a building throws two balls A and B. The ball A is thrown vertically upward and B is thrown vertically downward with the same speed. The ball A hits the ground with a speed A and the ball B hits the ground with a speed B. We have

Level 2

(a) A > B

(b) A < B

(c) A = B

(d) the relation between A and B depends on height of the building above the ground.

Solution

Q6. A body falls freely from rest. It covers as much distance in the last second of its motion as covered in the first three seconds. The body has fallen for a time of

Level 2

Solution

Q7. A body A is projected upwards with a velocity of 98 m/s. The second body B is projected upwards with the same initial velocity but after 4 sec. Both the bodies will meet after

Level 3

Solution :

Let’s End with a Balle - Balle!

Q8. A body, thrown upwards with some velocity reaches the maximum height of 50 m. Another body with double the mass thrown up with double the initial velocity will reach a maximum height of

Level 2

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