Answer:
Answer: B. 84 m/s
Explanation:
Uniform Speed Motion
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:
[tex]v_f=v_o+at[/tex]
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:
[tex]v_f=100-8*2=100-16[/tex]
[tex]v_f=84\ m/s[/tex]
Answer: B. 84 m/s
