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A fragment moves in one dimension, and its position as a function of time is given...

A fragment moves in one dimension, and its position as a function of time is given by x = (1.8 m/s)t + (−3.0 m/s2)t2.

(a) What is the fragments average velocity from t = 0.45 s to t = 0.55 s? (Indicate the direction with the sign of your answer.)__________ m/s
(b) What is the fragments average velocity from t = 0.49 s to t = 0.51 s? (Indicate the direction with the sign of your answer.)___________ m/s
(c) What is the fragments instantaneous velocity at t = 0.51 s ? (Indicate the direction with the sign of your answer.)__________ m/s

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