A ball is thrown vertically upward with a speed of

Vikolers6 2021-12-14 Answered
A ball is thrown vertically upward with a speed of 25.0 m/s. How long does the ball take to hit the ground after it reaches its highest point?
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Expert Answer

intacte87
Answered 2021-12-15 Author has 42 answers
Now if we measure the time to reach from heighest point point to the ground after reaching the heighest point, the initial vertical speed of the ball vi=0.0 ms1
The ball is moving under gravitational force, so the acceleration of the ball a=9.8 ms2
From part (a), the maximum height up to which the ball can reach S=31.9 m
Now the time taken by the ball to reach the ground can be calculated from the eqaution
S=vit+12at2
=0×t+12at2
=12at2
Therefore from the above equation, we get
t=2Sa
=2×31.9 m9.8 ms2
=2.55 s
Which is same as calculated in part(b) for to reach the ball to its maximum hight from ground.
Result: c) t=2.55 s

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