Help! im timed. A ball is thrown downward with an initial velocity of 12.1 m/s. How long will it take to reach a velocity of -24.5 m/s?

asked Sep 21, 2022 65.7k views

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help! im timed. A ball is thrown downward with an initial velocity of 12.1 m/s. How long will it take to reach a velocity of -24.5 m/s?

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Answer:

$1.27\:\text{s}$

Step-by-step explanation:

We can use the following kinematics equation to solve this problem:

v_f=v_i+at

Solving for
:

$-24.5=-12.1+-9.8t,\\-12.4=-9.8t,\\t=(-12.4)/(-9.8)\approx \boxed{1.27\:\mathrm{s}}$

GPiter answered Sep 27, 2022

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