MASSACHUSETTS INSTITUTE OF TECHNOLOGY
Department of Physics
Physics 8.01T
Fall Term 2004
InClass Problems 710: Newton’s Laws of Motion Solutions
We would like each group to apply the problem solving strategy with the four stages (see
below) to answer the following two problems.
I.
Understand – get a conceptual grasp of the problem
II.
Devise a Plan  set up a procedure to obtain the desired solution
III.
Carry our your plan – solve the problem!
IV.
Look Back – check your solution and method of solution
InClass Problem 7: Law of Addition of Velocities (Morning Session)
a) Suppose two cars, Car A, and Car B, are traveled along roads that are perpendicular to
each other. An observer is at rest with respect to the ground. A second observer is in Car
r
A. According to the observer on the ground, Car A is moving with a velocity
v
A
=
v
A
ˆ
j
,
r
and Car B is moving with a magnitude of velocity
v
B
=
v
B
ˆ
i
.
What is the velocity of Car B according to the observer in Car A?
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 Spring '08
 WHITE
 Physics, Solar System, Acceleration, Mass, Velocity, Comet

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