Unformatted text preview: ’Instructor(s): K. Muttalib and P. Sikivie I PHYSICS DEPARTMENT PHY 2053 Exam 1 February 9, 2005 Name (print, last ﬁrst): '
On my honor, I have neither given nor received unauthorized aid on this examination. Signature: YOUR TEST NUMBER IS THE 5-DIGIT NUMBER AT THE TOP OF EACH PAGE.
(1) Code your test number on your answer sheet (use 76—80 for the 5-digit number). Code your name on your
answer sheet. DARKEN CIRCLES COMPLETELY. Code your UFID number on your answer sheet. (2) Print your name on this sheet and sign it also.
(3) Do all scratch work anywhere on this exam that you like. Circle your answers on the test form. At the end of
the test, this exam printout is to be turned in. No credit will be given without both answer sheet and printout with scratch work most questions demand. .
(4) Blacken the circle of your intended answer completely, using a #2 pencil or blue or black ink. Do not make any stray marks or some answers may be counted as incorrect.
(5) The answers are rounded off. Choose the closest to exact. There is no penalty for guessing. (6) Hand in the answer sheet separately.
9 = 9.80 m/s 1. In order to receive credit for this problem, you must correctly code (“bubble”) both your 8-digit UFlD and your 5-digit
test number onto your scan sheet and also select the correct response below. Check right now that both numbers are
correctly bubbled. Code your UFID as if it were an ordinary 8-digit number—do not insert a blank space or hyphen
in the middle. (1) I have correctly bubbled my UFID and test number.
(2) I don’t think this is important. (3) I bubbled the wrong test number. (4) I don’t have time to check. (5) I bubbled the wrong UFID. 2. As a. rocket is accelerating vertically upward at 9.8 m/s2 near the Earth’s surface, it releases a stone. Immediately
after release the aceeleration of the stone is (1) 9.8 m/s2 down (2) 0 (3) 9.8 m/s2 up (4) 19.6 111/52 up (5) 19.6 m/s2 down 3. A car accelerates uniformly ﬁom rest and travels for 5.0 s with a uniform acceleration of +1.5 m/s2. The driver then
applies the brakes, causing a uniform acceleration of —2.0 m/sz. How long does it take for the car, after the brake is applied, to travel a distance of 12.5 m?
(1) 2.5 s (2) 3.0 s (3) 1.5 s (4) 1.0 s (5) 2.0 s 4. A particle undergoes two displacements. The ﬁrst has a. magnitude of 15 m and makes an angle of 120° with the
positive z—axis. The resultant of the two displacements is 10 m directed at an angle of 30° relative to the positive
z—axis. What is the direction of the second displacement, measured relative to the positive m-axis? (1) -26° (2) ~15° (3) ——50° (4) 32° (5) 48° 5. A rock is thrown straight up with an initial velocity of 24.5 m/s. What maximum height will the rock reach before
starting to fall downward? (Neglect air resistance.) (1) 30.6 m (2) 9.80 m (3) 19.6 m (4) 24.5 m (5) 14.3 m ...
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- Spring '06