25. While running at 120 kilometers per hour (120
km/hr), the driver saw a road sign that reads 60 km/hr
(speed limit). He slowly stepped on the brakes and
attained this speed limit in 15 seconds. What was the
acceleration of the car?
A. 60 km/hr
C. 4 km/hr/s
B. - 60 km/hr
D. - 4 km/h/s
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Answer:
C. 4 km/hr/s
Explanation:
Given: Vf = 120kph , Vi = 60kph , Time = 15s
(NOTE: Vf means Final velocity , Vi means initial velocity
What to find: Acceleration
Solution: 120kph - 60kph = 4km/hr/s
15
Explanation:
The acceleration of that car is estimated of 4 km/hr/s