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meriva
2 years ago
6

A ball is projected with velocity 10m/s at an angle of 30 degrees with the horizontal surface . The time taken by the ball to re

ach the ground is ... g=10
Mathematics
1 answer:
Tresset [83]2 years ago
7 0

The ball's vertical position in the air is given by

y=10\cos30^\circ\,t-\dfracg2t^2

and it will reach the ground at t for which y=0:

0=5\sqrt3\,t-5t^2=5t(\sqrt 3-t)\implies t=\sqrt3\approx1.73

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