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A man in a balloon rising vertically wit...

A man in a balloon rising vertically with acceleration ` 4.9m//s ^(2) ` of releases a ball 2 sec after the balloon is let go from the ground. The greatest height above ground reached by the ball is : ` ( g= 9.8m//s^(2)) `

A

`14.7 m`

B

`19.6 m`

C

`9.8 m`

D

`24.5 m`

Text Solution

Verified by Experts

The correct Answer is:
A
After `2 s upsilon = 4.9xx2=9.9`
and `h=(1)/(2)xx4.9xx(2)^(2)=9.8m`
Greatest height, `h_(max)=h+(upsilon^(2))/(2g)=14.7 m`
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DC PANDEY ENGLISH-MOTION IN A PLANE-Check point 3.5
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