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A body moves along a straight line and it's acceleration 'a' which varies with time is given by a= 2-3t. Five seconds after start of the observations, it's velocity is found to be 20m/s. Ten seconds after start of the observation, the body is at 85m from the origin. Determine:
1) it's acceleration, velocity and distance from the origin
2) the time in which the velocity becomes zero and the corresponding distance from the origin ​

Sagot :

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