CSULA PHYS211 Summer’12 Chapter 2: Motionin One Dimension Homework Assignment #1 ConceptualProblems 1. Driver A is cruising along enjoying the fall colors. Driver Bstarts her car at the instant he...

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Answered Same DayDec 22, 2021

Answer To: CSULA PHYS211 Summer’12 Chapter 2: Motionin One Dimension Homework Assignment #1...

David answered on Dec 22 2021
120 Votes
1. The graphs are not given.
2. We have x=24t-2t3
Velocity v=dx/dt=24-6t2
Velocity is zero at
t=2 sec.
Acceleration a=dv/dt=-12t
Acceleration is -24 m/sec2 when the velocity is zero.
Answer=(a).
3. let x = time of acceleration and y = time at constant speed
cruising speed, v is
v = u + at = 0 + 1*x = x
distance covered during the acceleration phase, sa, is
sa = ut + 0.5at^2 = 0 + 0.5*1*x^2 = 0.5x^2
distance covered at the cruising speed, sc is
sc = vy = xy
x + y = 60 (remember to convert minutes to seconds)
sa + sc = 1350
so we have
0.5x^2 + xy = 1350
and y = 60-x
that is...
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