The motorcyclist moves with a constant acceleration of 5m / s squared, the speed gradually

The motorcyclist moves with a constant acceleration of 5m / s squared, the speed gradually increases to 90 km / h at what distance the speed will be established and after what time.

These tasks: a (constant acceleration of a given motorcyclist) = 5 m / s2; V2 (required speed) = 90 km / h (in SI V2 = 25 m / s).

1) Distance at which the speed of 90 km / h will be established: S = (V2 ^ 2 – V1 ^ 2) / 2a = (25 ^ 2 – 0 ^ 2) / (2 * 5) = 62.5 m.

2) The duration of the required speed: t = (V2 -V1) / a = (25 – 0) / 5 = 5 s.

Answer: The speed of 90 km / h will be established in 5 s at a distance of 62.5 m from the starting point of acceleration.