The body moves uniformly accelerated. How long after the start of the movement the direction

The body moves uniformly accelerated. How long after the start of the movement the direction of the speed will change to the opposite, if the initial speed = 15 m / s, and acceleration = -3 m / s2

To find the time after which the body will stop and continue moving in the opposite direction, we will use the formula: t = (V – Vn) / a.

Variable values: V – final speed (V = 0 m / s); Vн – initial speed (Vн = 15 m / s); a – acceleration (a = -3 m / s2).

Calculation: t = (V – Vn) / a = (0 – 15) / (-3) = 5 s.

Answer: The direction of speed of the body in question will change to the opposite after 5 seconds of movement.