Physicsmedium · Past Paper
A car decreases its speed from 80 km/h to 60 km/h in 5 seconds. What is the retardation?
A1.11 m/s^2
B4 m/s^2
C1.5 m/s^2
D2.22 m/s^2
✓ Correct Answer: A — 1.11 m/s^2
Change in speed = 20 km/h = 5.55 m/s. Retardation = 5.55/5 = 1.11 m/s^2.
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