JEE · NEET Previous Year Question
A particle of mass is dropped from a height above the ground. At the same time another particle of the same mass is thrown vertically upwards from the ground with a speed of . If they collide head-on completely in elastically, the time taken for the combined mass to reach the ground, in units of is
Topic: JEE PYQ
Answer: A. Full step-by-step solution below.
- A
- B
- C
- D
Correct answer: A
Solution
(a) JEE Main 2020time for collision
After
and
at the time of collision
and height from ground
so time
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