The body moves evenly within 6 increases its speed from 10 m / s to 1.44 km / h. With what acceleration

The body moves evenly within 6 increases its speed from 10 m / s to 1.44 km / h. With what acceleration does the body move?

Given:

V0 = 10 m / s – initial velocity of the body;

V1 = 1.44 km / h = 0.4 m / s – the speed of the body through the time interval t;

t = 6 seconds – the time during which the body changed its speed.

It is required to find the acceleration of the body a (m / s ^ 2).

a = (V1 – V0) / t = (0.4 – 10) / 6 = -9.6 / 6 = -1.6 m / s ^ 2 – the minus sign means that the acceleration is directed in the direction opposite to the speed, that is, the speed of the body decreases.

Answer: the body moves with an acceleration of -1.6 m / s ^ 2 (slows down).