1.

A ballon is moving vertically up with a velocity 4 m/s. When it is at a height `h`, a body is gently released from it. If it reaches ground in 4 sec, the height of balloon, when the body is released, is: (Take `g = 9.8 m//s^(2)`)A. 62.4 mB. 42.4 mC. 78.4 mD. 82.2 m

Answer» Correct Answer - A
`s = ut + (1)/(2) at ^(2)`
`h = -4 xx 4 + (1)/(2) xx 9.8 xx (4)^(2) = - 16 + 78.4 = 62.4 m`


Discussion

No Comment Found

Related InterviewSolutions