PHYS 1401 Sample Test Questions Name _______________________
Instructions:
 All calculations must begin by first writing down a Symbolic Equation. Work must then be shown clearly.
 When requested, explanations are required for credit.
 Final answers and units must be clearly indicated by boxing, circling, or underlining.
 Unnecessary and/or incorrect work subtracts from correct work.
 Illegible writing, or writing smaller than this font, will receive little or no credit.
 The instructor/proctor will not comment on your work during the examination.
 Assume that all numbers are known to 3 significant figures, e.g. 5 meters = 5.00 meters.
 All for-credit work must be written on the exam, no attachments are allowed.
 Point values are written in [brackets] at the beginning of a question.
 Scientific/graphing calculators are allowed.
 Display or use of a cell phone or wireless device results in a score of zero for the exam.
1. [1] A frictionless dynamics car is
projected up an inclined track with an
initial velocity of +10m/s. The car rolls up,
stops, and comes back down the track.
The velocity versus time graph is shown.
Which best describes the velocity of the object?
__the velocity is a constant positive value
__the velocity is a constant negative value
__the velocity starts off positive and becomes progressively less positive
__the velocity starts off negative and becomes progressively more positive
2. [2] A 1500kg car driving on a level road at 40m/s slows to a stop with a uniform acceleration
of -4m/s/s. Calculate the stopping distance.
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3. [1] A car is driving in the Westward direction and is slowing down. What is the direction of the
acceleration of the car? Circle the best answer and explain for credit.
East
West
North South
none of these
cannot be determined
4. Two objects on a horizontal frictionless
surface are being accelerated to the right by a
push on the larger mass as shown.
a) [2]Draw a force diagram for the 12kg mass in
the box below the masses.



Label each force correctly.
Draw neatly and large enough to see.
Use the size convention shown below for
the horizontal forces.
b) [3] Calculate the size of the contact force that is being exerted on the 3kg mass by the 12kg mass.
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