The body moves with an initial speed of 10m / s and an acceleration of -2m / s2, if the final speed is 5m / s, find the time.

To find the time of movement, after which the speed of the body will reach 5 m / s, we will use the formula: t = (Vк – Vн) / а.

Variables: Vк – required speed (Vк = 5 m / s); Vн – initial speed (Vн = 10 m / s); a – constant acceleration (a = -2 m / s2).

Calculation: t = (Vk – Vn) / a = (5 – 10) / (-2) = 2.5 s.

Answer: The body will reach the required speed in 2.5 seconds.

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