The problem that follow involve straight-line motion. The time t is in seconds unless otherwise stated.
Problem
The acceleration of a point moving along a .straight line is a = 4t + 2 m/s2. When t = 2 s, the position of the point is s= 36 m, and when t = 4 s. its position is s =90 m. What is the velocity of the point when t = 4 s?
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