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Mashutka [201]
4 years ago
9

Sarah throw a ball straight up in the air with initial velocity of 19.62m/s. how long will the ball be in the air

Physics
1 answer:
Orlov [11]4 years ago
7 0

Here Sarah projected the ball upwards by speed

v_i = 19.62 m/s

here the acceleration is due to gravity

a = 9.81 m/s^2

now when ball again lends on the ground the displacement of ball will be zero

\delta y = v_y * t + \frac{1}{2} at^2

0 = 19.62 t - \frac{1}{2}9.81*t^2

by solving above equation

t = 4 s

so it will take 4 s to reach back on ground

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