15. The graph below shows the motion of a part of a
car journey.
a) between which two points is the car travelling at a
steady speed?
b) what is the acceleration of the car between C and
D?
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Answer:
-8 m/s²
Explanation:
between which two points is the car travelling at a steady speed
Speed / Velocity is changing contentiously
from Point A to B acceleration = (24 - 0)/(3-0) = 8 m/s²
from Point B to D acceleration = (0 - 24)/(6-3) = -8 m/s²
the acceleration of the car between C and D
= (0 - 16)/(6-4)
= -16/2
= -8 m/s²
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