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stellarik [79]
2 years ago
5

1. A ball is thrown downward with an initial speed of 22 m/s on Earth. a. What is the acceleration of the ball? b. Calculate the

displacement during the first 4 s. c. Calculate the time required to reach a speed of 60 m/s.​
Physics
1 answer:
vitfil [10]2 years ago
6 0

Answer:

Explanation:

The acceleration of the ball would be due to the downward force of gravity, 9.8m/s^2. In order to find the displacement given that interval of time, you have to use the corresponding kinematic formula:

d=v_it+at^2/2

The initial velocity was given, the time was given, and the acceleration was given. Therefore:

d=(22m/s)(4s)+(9.8m/s^2)(4s)^2/2

d=166.4m

To find the required time given a desired final velocity, we can use:

v_f=v_i+at

60m/s=22m/s+(9.8m/s^2)(t)

38=9.8t

t=3.9s

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