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How long does it take an automobile traveling 66.7 km/h to become even with a car that is traveling in another lane at 52.7 km/h if the cars’ front bumpers are initially 119 m apart?

Respuesta :

MathPhys

Answer:

30.6 seconds

Explanation:

Assuming the cars are moving in the same direction, the relative velocity is:

v = 66.7 km/h − 52.7 km/h

v = 14 km/h

Convert to m/s:

v = 14 km/h × (1000 m/km) × (1 hr / 3600 s)

v = 3.89 m/s

Distance = speed × time

119 m = (3.89 m/s) t

t = 30.6 s

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