With uniformly accelerated motion, the speed of the body in 10 s decreased by 4 m / s. Find the acceleration of the body.

The speed of body movement can be expressed by the formula:
V = V0 + a * t, where V is the final velocity of the body, V0 is the initial velocity of the body, a is the acceleration of the body (m / s²), t is the time of the body’s movement (t = 10 s).
Let us express and calculate the acceleration of the body during braking:
V = V0 + a * t.
V – V0 = a * t, so the speed decreased by 4 m / s, then V – V0 = -4 m / s.
-4 = a * 10.
a = -4 / 10 = -0.4 m / s².
Answer: The acceleration of the body is equal to -0.4 m / s².