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PHY 1001- Phvsics
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Name:
Sua wT-tDilS
Pleasedo all five of the following problems.Eachproblemis worth
points. You are
permittedto usea formula sheet, calculatorandruler. Please showyour work'
l) Theradiusof Mars'sorbit aroundthe sun(assumedto be ciicular) is 2.28x 108krn,
andits orbitalperiodis 687 daYs'
Midterm ExamI
a) (8 points)\Yhatis the magnitude of Mars' orbitalvelocity,in m/s?
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b) (8 points) what is the radial acceleration of Mars towards the Sun?
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Z) Apilot wishesto fly duewest. Thewind is blowingtowards
the northat 100.0kmlh.
a) (7 points)If theairspeed
of her planeis 250.0km./h, in which directionshouldthe
pilothead?
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b) (7 points) What is the resultingspeed of the planijbver the ground?
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c) (3 points) Please draw the resulting vector diagram.
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(8points)rryoutossthedarrwith " "".|,fl #'k-ffi: : ;& the horizontal, you hit the bulls-eye. How much higher is the bulls-eye than your tt
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- You areplaying dartswith your friends.The targetis at a horizontaldistanceof 2.1m from your hand,and its bulls-eyeis locatedhigherthanyour hand. a) (9 points) Draw free-bodydiagramsshowingthe forceson the dart (i) just after it
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An 8.00kg rocket,launched from Mars (9=3.73./st), burnsfuel that exertsatime-
yavine upwardforce on the rocket. The force obeys.the equationF(t):A+Bf. The
forceis measured at 100.0N at F0 and 150.0N at 2. s.
a)
points) Find the constants A and B, including their sI units.
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b) (10 poin*) What is the net force on the rocket and its acceleration(you may
neglectthe massof the fuel ejectedfrom the rocket) at F0 andF3.00 s?
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