Question

A ball is thrown vertically upward with a velocity 98m/s. Calculate the total time ot takes too return too thr ground

Answer 1

Answer:

10 sec

Explanation:

Answer 2

$\huge \fcolorbox{red}{pink}{Solution :)}$

Given ,

Inital speed (U) = 98 m/s

Final speed (V) = 0 m/s

Acceleration due to gravity in toward up is (A) - 9.8 m/s²

By using Newton's first equation of motion ,

$\large \sf \fbox{V = U + AT}$

Substitute the known values , we get

$\sf \mapsto 0 = 98 - (9.8)t \\ \\ \sf \mapsto t = \frac{ - 98}{ - 9.8} \\ \\ \sf \mapsto t = 10 \: \: sec$

If , time for upward direction is equal to the time for downward direction

Then time taken by a ball to reach ground is 10 + 10 i.e 20 sec

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