A person driving a car at 180km/h sees a fallen tree on the road. He brakes immediately upon seeing the obstacle and manged to stop the car

Question

A person driving a car at 180km/h sees a fallen tree on the road. He brakes immediately upon seeing the obstacle and manged to stop the car in 5 seconds. What was the acceleration of the car assuming it to be uniform? ​

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Thu Hương 3 years 2021-08-29T14:35:26+00:00 1 Answers 8 views 0

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  1. mit
    0
    2021-08-29T14:37:16+00:00
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    Answer: a = 10 m/s²

    opposing original velocity.

    Explanation:

    180 km/hr (1000 m/km) /(3600 s/hr) = 50 m/s

    a = Δv/t = (0 – 50) / 5 = -10 m/s²

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