Homework Answers
(1) it is given that
a = At3
than -
A = a/t3 = m/s2×s3
A = m/s5
(2) option(b)
velocity is negative so velocity direction is -x direction. but acceleration is positive so speed is decreasing in -x direction.
(3) option(a) less than 40km/h
average velocity is (v) = 2v1v2/(v1+v2)
v = 2×30×50÷(50+30)
= 37.5km/h
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