When a car driver travelling at a speed of 40 m/s applies brakes and brings the car to rest in 10 s, then the acceleration will be
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- 4 m/s²
Explanation:
Given -
A car driver travelling at a speed 40 m/s applies brakes and brings the car to rest in 10 s, then the acceleration will be
Solution -
Here,
initial speed (u) = 40 m/s
final speed (v) = 0 m/s (rest)
Time taken for acceleration (t) = 10 s
acceleration = (v - u)/t
= (0-40)/10 m/s²
= -40/10 m/s²
= -4 m/s²
Hence the acceleration is - 4 m/s².
Negative acceleration is called retardation, so we can say that it is retardation of 4 m/s².
hope it helps.
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