The body began to move equally accelerated from a state of rest and in 2 s passed 30 meters. What is the final speed of the body?
To obtain the value of the final speed of a given body, we will use the formula: S = (Vk + Vn) * t / 2 = (Vk + 0) * t / 2, whence we express: Vk = 2S / t.
Variables: S (distance traveled) = 30 m; t – elapsed time (t = 2 s).
Calculation: Vк = 2S / t = 2 * 30/2 = 30 m / s.
Answer: After 2 seconds, the speed of the given body became equal to 30 m / s.
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