PHY 2053 Midterm: Sum12Exam1
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Instructor(s): C. Parks
PHYSICS DEPARTMENT
PHY2053, Summer 2012 EXAM 1 June 12, 2012
Name (print, last first): Signature:
On my honor, I have neither given nor received unauthorized aid on this examination.
YOUR TEST NUMBER IS THE 5-DIGIT NUMBER AT THE TOP OF EACH PAGE.
(1) Code your test number on your answer sheet (use lines 76–80 on the answer sheet 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.
(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. If you
believe that no listed answer is correct, leave the form blank.
(6) Hand in the answer sheet separately.
Given Information:
g= 9.80 m/s2G= 6.67 ×10−11 Nm2/kg21 mile = 5280 ft 1 year = 365 days
1 day = 24 hours 1 hour = 60 minutes 1 minute = 60 seconds C= 2πr
1. The period of a simple pendulum is proportional to the square root of its length. By what factor must the length of the
pendulum be changed to increase its period by a factor of 1.5?
(1) 2.25 (2) 1.5 (3) 1.22 (4) 0.44 (5) None of these.
2. Convert 60 miles/hour into feet/second.
(1) 88.0 ft/s (2) 40.9 ft/s (3) 5280 ft/s (4) 0.682 ft/s (5) None of these.
3. A truck is driving down the highway. While the traffic is light, the truck travels at 70 miles/hour for 45 minutes. In
heavier traffic, the truck travels at 50 miles/hour for 30 minutes. What is the average velocity of the truck?
(1) 62 miles/hour (2) 60 miles/hour (3) 58 miles/hour (4) 56 miles/hour (5) None of these.
4. While driving down Museum Road, you see Mr. Parks crossing the road. Seeing your opportunity, you accelerate from
9.0 m/s (about 20 miles/hour) to 15 m/s in a distance of 20 m. What is the acceleration of your car?
(1) 3.6 m/s2(2) 0.30 m/s2(3) 7.2 m/s2(4) 9.8 m/s2(5) None of these.
5. Bowser is on a 25 m tall cliff that overlooks Princess. He drops a cylindical cage with radius 3 m from the cliff directly
above Princess. Mario sees Bowser and warns Princess. If the cage is dropped at the same instant that Princess hears
Mario’s warning, what is the minimum acceleration she needs so that the cage misses her? Assume Princess is standing
still directly below the center of the cage when it is dropped.
(1) 1.18 m/s2(2) 2.34 m/s2(3) 0.59 m/s2(4) 1.84 m/s2(5) None of these.
6. Standing on a bridge, you throw a stone straight upward. The stone hits a stream, 37 m below the point at which you
release it, 3.7 seconds later. What is the velocity of the stone after it leaves your hand?
(1) 8.13 m/s (2) 28.1 m/s (3) 5.18 m/s (4) 16.4 m/s (5) None of these.
Document Summary
On my honor, i have neither given nor received unauthorized aid on this examination. Your test number is the 5-digit number at the top of each page. (1) code your test number on your answer sheet (use lines 76 80 on the answer sheet for the 5-digit number). 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. 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. (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 o .
