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Unformatted text preview: wishes to pass an automobile and so begins a 30 sec. period of constant acceleration at 0.05 m/sec 2 . During this period the truck travels 700 m. What was the trucks initial speed and what is its Fnal speed ? Problem 3. The position of a runner is given by x = 4 . t. 50 t 2 , where x is in meters and t is in sec. Answer the following questions: (i) What is the velocity of the runner at t = 5 sec. ? You need to give the magnitude and direction since velocity is a vector. (ii) What is the average speed of the runner between t = 0 and t = 8 sec. ? (iii) What is the average velocity of the runner between t = 0 and t = 8 sec. ? (iv) What are the velocity and acceleration of the runner at t = 4 sec. ?...
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 Spring '07
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