Answer:
a = - 25 m/s²
Explanation:
The magnitude of acceleration or deceleration of an object can be found by using the third equation of motion as follows:
2as = Vf² - Vi²
where,
a = magnitude of acceleration = ?
Vf = Final Velocity = 15 m/s
Vi = Initial Velocity = 25 m/s
s = distance traveled = 8 m
Therefore,
2a(8 m) = (15 m/s)² - (25 m/s)²
a = (- 400 m²/s²)/(16 m)
a = - 25 m/s²
Here negative sign indicates deceleration
