A particle of mass m is dropped from a height h above the ground. At the same time another particle of the same mass is thrown vertically upwards from the ground with a speed of √(2gh). If they collide head-on completely inelastically, the time taken for the combined mass to reach the ground, in units of √(h/g) is:

Rotational Motion: JEE Main 2020 Physics question

JEE Main 2020 · 8 Jan, Evening shift · Q6221

JEE Main 20208 Jan, Evening shiftPhysicsHardRotational Motion140× since 2002

A particle of mass m is dropped from a height h above the ground. At the same time another particle of the same mass is thrown vertically upwards from the ground with a speed of

\sqrt {2gh}

. If they collide head-on completely inelastically, the time taken for the combined mass to reach the ground, in units of

\sqrt {{h \over g}}

is :

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JEE Main 2020 Rotational Motion Question with Solution (8 Jan Evening shift, Q6221) | JEE Arc