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A PARTICLE MOVES ALONG THE X-AXIS. ITS POSITION VARIES WITH TIME ACCORDING
TO THE EXPRESSION x = -4t + 2t2, WHERE x IS IN METERS AND t IS IN SECONDS. THE
POSITION-TIME GRAPH FOR THIS MOTION IS SHOWN IN THE FIGURE.
x (m)
10
(D
Displacement:
8.
4
8
Slope = +4 m/s
a. Displacement at t = 0 s t=1 s and t = 1 s → t = 3 s
Slope -2 m/s
4
b. Average velocity during the time intervals in (a)
(s)
-2
B
c. Instantaneous velocity at t= 2.5 s
-4
1
3
4

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