Question

Help me and get points...
Please


If you walk to the edge of a cliff and
throw a ball upward at 60 m/s, how
many seconds will it take for the ball
to be traveling at 30 m/s downward?

Answer 1

According to your question,

acceleration due to gravity on earth, a = 9.8m/s

initial velocity, u = 0

final velocity, v = 30m/s

As we know that, v = u + at

So,

$t = \frac{(v - u)}{a}$

$= \frac{(30 - 0)}{9.8}$

$= \frac{30}{9.8}$

$3.06122...$

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