12-1.
Chapter 12
A particle is moving along a straight line such that its position is defined by (1020) mm, where I is in seconds. Determine (a) the displacement of the particle during the time interval from 1sto1-5s, (b) the average velocity of the particle during this time interval, and (c) the acceleration when I s.
SOLUTION
3=10+20
(a), 10(1)+20= 30 mm
10(5)² + 20 = 270 mm
A270-30 240 mm
Ans
(b) A15-1=48
AN Δ 240 Favy = 60 mm/s
Ans.
(c) a d's dr 20 mm/s² (for all )
Ans
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