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with magnitude A for 2 seconds, and then runs at constant speed until the end.

a) Find the position (relative to the start position) and speed of the runner at the end of

the 2 seconds in terms of A. ANS: 2A , Vx=2A

b) Assume that the runner takes a total of 10 seconds to run the 100 meters. Find the

value of the acceleration A. You can leave your answer in terms of a fraction but clearly

indicate the units. ANS: 100/18

.....struggling with b) !!!!!!!!!!!!!!!!