Answer:
5.88 m/s
Explanation:
The following data were obtained from the question:
Initial velocity (u) = 7 m/s
Acceleration (a) = –0.6 m/s²
Distance (s) = 12 m
Final velocity (v) =.?
We, can determine how fast the sprinter is running when he crosses the goal line as follow:
v² = u² + 2as
v² = 7² + (2 × –0.6 × 12)
v² = 49 + (–14.4)
v² = 49 – 14.4
v² = 34.6
Take the square root of both side
v = √34.6
v = 5.88 m/s
Therefore, the sprinter is running at a speed of 5.88 m/s when he crosses the goal line.
