Approaching the intersection, the bus driver reduced the speed from 20 to 10 m / s.

Approaching the intersection, the bus driver reduced the speed from 20 to 10 m / s. How long did the braking last if the magnitude of the acceleration during such a movement was 0.5 m / s2?

Problem data: V1 (initial bus speed) = 20 m / s; V2 (bus speed after braking) = 10 m / s; a (acceleration during deceleration) = 0.5 m / s2.

The braking time of the bus can be determined by the formula: t = (V1 – V2) / a.

Let’s perform the calculation: t = (20 – 10) / 0.5 = 20 s.

Answer: The bus braking lasted 20 seconds.