The body speed in 4 seconds increased from 12 m / s to 28 m / s. With what acceleration does the body move?

t = 4 s.

V0 = 12 m / s.

V = 28 m / s.

a -?

According to the definition, the acceleration of a body a is a vector physical quantity that shows the rate of change in the body’s velocity V.

The acceleration of the body, and is determined by the formula: a = (V – V0) / t, where V is the final velocity of the body, V0 is the initial velocity of the body, t is the time interval during which the velocity has changed.

a = (28 m / s – 12 m / s) / 4 s = 4 m / s ^ 2.

Answer: the acceleration of the body is a = 4 m / s ^ 2.