Question

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Answer 1

(i) = This is when the velocity is not constant, so from (0,3) U (5,7)

(ii) = Acceleration is the rate of change of velocity. a = (vf-vi)/(tf-ti)

a = 0/2 = 0m/s^2

The velocity is constant so that the acceleration is zero

(iii) = The displacement is the area under the curve so 1/2bh

d = 1/2(2)(15)

d = 15m  

Answer 2

a) 0-3s and 5-7s

b) acceleration is 0

c) 15+1/2*30  =  30m