(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A ball is dropped from a balloon going up at a speed of

7 m/s. If the balloon was at a height 60 m at the time

of dropping the ball, how long will the ball take in

reaching the ground ?

2. Relevant equations

u = –7 m/s, s = 60 m, a = g = 10 m/s^2

3. The attempt at a solution

i tried solving it by using D=ut+1/2at^2

n got stuck wit this 5t^2+7t-60=0

can any one tell me a simpler say to solve this equation?

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Rest and motion kinematics

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