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A runner covers the last straight stretch of a race in 4 s during that time he speeds up 5 m s to 9 m s what is the runbers acceleration in this part of the race?
Wiki User
∙ 9y ago
Vi = 5 m/s A = (V_f- V_i )/t = (9 m⁄s- 5 m⁄s )/(4 sec) = (4 m⁄s )/(4 sec) = Vf = 9 m/s Change in time = 4 sec
Wiki User
∙ 9y ago
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