Position Functions and Instantaneous Velocity Video Lessons

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Problem: An object's position as a function of time is given by the equation y(t) = 5 - 7t  2 + 2t3. Its acceleration is A. constant with an undetermined value. B. varies with time, with a value of -14 m/s 2 at t = 0. C. varies with time, with a value of 0 at t = 0.  D. constant with a value of -9.8 m/s 2.

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Problem Details

An object's position as a function of time is given by the equation y(t) = 5 - 7t  2 + 2t3. Its acceleration is

A. constant with an undetermined value.

B. varies with time, with a value of -14 m/s 2 at t = 0.

C. varies with time, with a value of 0 at t = 0. 

D. constant with a value of -9.8 m/s 2.

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