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bonufazy [111]
2 years ago
6

A golf ball starts with an initial velocity of 100m/s and slows at a constant rate of -8m/s2, what is its final velocity after 2

s?
Vf = Vi+at

A. 20 m/s

B. 84 m/s

C. 16 m/s
Physics
1 answer:
Illusion [34]2 years ago
8 0

Answer:

<em>Answer: B. 84 m/s</em>

Explanation:

<u>Uniform Speed Motion</u>

It's a type of motion in which the velocity of an object changes by an equal amount in every equal period of time thus, the acceleration is constant.

Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the final speed is calculated as follows:

v_f=v_o+at

The golf ball starts with an initial speed of 100 m/s and slows down at a=-8\ m/s^2. We are required to find the final speed at t=2 s:

v_f=100-8*2=100-16

v_f=84\ m/s

Answer: B. 84 m/s

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a. 46 m/s east

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v=u+at

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The jet in the problem has, taking east as positive direction:

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u = +16 m/s  is the initial velocity

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