The acceleration of Joe as he ran at constant acceleration is 2m/s².
Given the data in the question;
Since Joe starts from rest,
- Initial velocity; [tex]u = 0[/tex]
- Final velocity; [tex]v = 8m/s[/tex]
- Time taken; [tex]t = 4s[/tex]
Acceleration; [tex]a =\ ?[/tex]
To determine the acceleration, we use the First Equation of Motion:
[tex]v = u + at[/tex]
Where v is final velocity, u is initial velocity, a is acceleration and t is time taken.
We substitute our given values into the equation
[tex]8m/s = 0 + [ a * 4s]\\\\8m/s = a * 4s\\\\a = \frac{8m/s}{4s} \\\\a = 2m/s^2[/tex]
Therefore, the acceleration of Joe as he ran at constant acceleration is 2m/s².
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