Approaching a traffic light, the motorcyclist changed his speed from 10 m / s to 4 m / s in 15 seconds.

Approaching a traffic light, the motorcyclist changed his speed from 10 m / s to 4 m / s in 15 seconds. Specify the type of equal-variable motion. Specify the acceleration.

When braking, the motorcyclist makes an equally slow motion. Moreover, its acceleration is

a = (v2 – v1) / t,

where v1 and v2 are the initial and final speeds of movement;

t is the braking time.

Let’s substitute the known values:

a = (4 – 10) / 15 = -6 / 15 = -0.4 m / s².

The “-” sign in the acceleration value indicates that the movement is uniformly slowed down.