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A projectile at its highest point, break...

A projectile at its highest point, breaks into two equal parts due to an internal explosion. One part moves vertically up at 30 m/s with respect to ground. Then the other part will move with speed if (Speed just before explosion is 20 m/s) :

A

`20m//s`

B

`10sqrt(3) m//s `

C

50 m/s

D

30 m/s

Text Solution

Verified by Experts

The correct Answer is:
C

` vecP_(1)=vecP_(f)`
`mxx20 hati = (m) /(2) xx30 hatj +(m)/(2) xx vecv`
` vecv - 40 hati - 30 hatj`
` | vecv | = 50`
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