What is the distance a motorcyclist will travel during braking to a full stop if he moves

What is the distance a motorcyclist will travel during braking to a full stop if he moves with an acceleration of 4 m / s ^ 2 and stops at the same time in 7 s?

These tasks: a (acceleration of the motorcyclist before braking) = 4 m / s2; t (deceleration time) = 7 s.

1) Let’s calculate the speed of the motorcyclist before braking: 0 = V0 – a * t, whence V0 = a * t = 4 * 7 = 28 m / s.

2) The distance traveled by the motorcyclist in question to a complete stop: S = V0 * t – 0.5 * a * t ^ 2 = 28 * 7 – 0.5 * 4 * 7 ^ 62 = 98 m.

Answer: A motorcyclist will have time to drive 98 meters to a full stop.