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12) A sprinter running a 100 m race starts at rest and accelerates at constant acceleration A for 3.0 seconds and then maintains a constant velocity. In terms of A, what is the position of the runner after 3.0 seconds? What is A if the sprinter finishes the race in 12.0 seconds? 13) What force is needed to accelerate a 30.0 lb block at 2.2 m/s2? 14) What force is needed to stop a 1500 kg car in 40 m ifit is initilly moving at 35 miles per 15) A particle is moving in a straight line with constant acceleration a. Derive a general equation hour? for velocity v at position x in terms of initial velocity vo, initial position xo, and acceleration a
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12 from kinematic Eanation sultat So hat JA (3) 4. CA str 100 - A12 FA A - 10/12 = 1-3238 13) From Nentors and laun Tama m-3

15) a- dv dv. du de at - vo dv v.dv andx integrating both sides vor alade . Vivo – aix) va vor + 2 ar-no)

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