Physics 9 movement with acceleration. During emergency braking, the car moving at a speed
| December 16, 2020 | education
Physics 9 movement with acceleration. During emergency braking, the car moving at a speed of 90 km / h stopped after 5 seconds. Find the braking distance of the car.
1) 90 km / h = 25 m / s.
2) a = dV / dt = 25/5 = 5 m / s ^ 2.
3) S = V0t – at ^ 2/2 = 25 * 5 – 5 * 25/2 = 125-62.5 = 62.5 m.
Answer: The braking distance of the car is 62.5 m.
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