Physics 211 Computer Intensive Physics
First Hour Exam The Paper Portion

Name

Spring, 1998
2/5/98

The paper portion.

Total points 40 points-For partial credit, SHOW

YOUR WORK, i.e. do NOT just write down a numerical answer.

1. (10 points)During a race, a bicyclist accelerates with a constant 6 m/s²along a
straight racecourse. An observer standing at the track edge observes her to
have a speed of 18 m/s as she goes by. What speed does a second observer,
21 m further down the track, observe her to have as she passes him? Show
your work and explain your reasoning.

At t = 0, what is the direction of the particle's velocity vector? (Give your
answer in degrees counter-clockwise from ^{^}
i .)

Constant:

g = 9.80 m/s²

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