Determine the braking distance of the car if it was moving at a speed of 72 km / h and stopped in 5 s.

univerkov | December 3, 2020 | education

Given:
v = 72 km / h
t = 5 s
Find: S
Decision:
72 km / h = 20 m / s – translate to SI
a = v / t = 4 we find the acceleration by the formula
S = at ^ 2/2 then find the traversed path
S = 4 * 25/2
S = 50 m
Answer: 50 m

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