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Velocity vector of a particle just befor...

Velocity vector of a particle just before making an inelastic impact with horizontal smooth surface with coefficient of restitution 0.2 is `(3hati - 10 hatj - 50 hatk)` m/s with z-axis being vertically upwards. Velocity of the particle 1s after collision (in m/s) will be:-

A

`(3hati - 10hatj + 10hatk)`

B

`-(3hati - 10hatj + 10hatk)`

C

`(3hati - 10hatj)`

D

`-(3hati - 10hatj)`

Text Solution

Verified by Experts

The correct Answer is:
C
Velocity after collision will be
`=3hati - 10hatj + 10hatk`
Velocity after 1 second `=3hati - 10hatj`
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