Lab Exam Review

Jeremiah Weston Lab Physics Exam Review Lab 6: Newtons Second Law 1. A 5.05 kg racoon hangs in the middle of a clothesline, pulling it down at an angle of 25.1° from the horizontal. What is the tension in the line, in newtons? Lab 7: Centripetal Motion 2. The centripetal force was always correlated with the a. mass of the bob b. speed of the bob c. stretch of the spring d. period 3. You used the hanging masses to find a. the spring force. b. the mass of the bob. c. the acceleration of the bob. d. the acceleration due to gravity. 4. Suppose you increase the mass of the bob, but keep everything else the same, and run the experiment again. Which of these would increase? a. the hanging mass b. the centripetal force c. the velocity d. the period 5. When the bob is spinning which force, if any, is pointing upward? a. the spring b. the two black strings c. a force not listed here d. gravity e. the string running over the pulley to the hanging masses f. no force 6. When the bob is spinning which force, if any, is pointing downward? a. gravity b. the string connected to the hanger c. the spring d. no force e. a force not listed here f. the two black strings

7. When the bob is spinning which force, if any, is pointing outward? a. no force b. gravity c. the string connected to the hanger d. a force not listed here e. the spring f. the two black strings 8. When the bob is spinning which force, if any, is pointing inward? a. a force not listed here b. the string connected to the hanger c. no force d. the spring e. gravity f. the two black strings 9. What is the tension in newtons of a spring that holds up 750g at rest. 10. The spinning bob completes 75 revolutions in 46.69 seconds, at a radius of 16.8cm. What is the speed, in m/s? 11. A 541g bob takes 30.81 s to spin 64 times, with a radius of 16.5 cm. What is the spring force? 12. A bob of mass 579 g is timed at 37.84 s for 49 periods. If you used 1,108 grams hanging to balance the spring at this radius, what is the radius in cm? Lab 8: Work 13. Which instruments did you use to find potential energy in this experiment? a. Ruler b. Stopwatch c. Balance d. force detector

20.A larger sample of aluminum would have a density that is a. Smaller b. The same c. Larger 21.Because of the cold, the aluminum would have contracted a little when finding the density of liquid nitrogen. This would make the buoyant force a. Smaller b. The same c. Larger 22.If you used a smaller sample of aluminum when finding the density of nitrogen, the buoyant force on the aluminum would be a. Smaller b. The same c. Larger 23.If you used a smaller sample of aluminum when finding the density of liquid nitrogen, the density of nitrogen would be a. Smaller b. The same c. Larger 24.If your aluminum was wet, ice would form on it. Ice is more dense than liquid nitrogen. This would make the tension in the string a. Smaller b. The same c. Larger 25.Because of the cold, the aluminum would have contracted a little when finding the density of liquid nitrogen. This would make the gravitational force on the aluminum a. Smaller b. The same c. Larger Lab 11: Torque

26.A meter stick is balanced at the center. A 64.1 g mass is hung from the 16.46 cm mark. What mass, in grams, do you need to add at the 63.42 mark to balance? 27.A meter stick is balanced at the center. A 46.9 g mass is hung from the 21.97 cm mark. At what cm mark should you put a 73.1 g mass to balance? 28.Three masses are hanging from a meter stick, balanced about its center. The masses and positions on the mater stick are given. (Note this are position as read on the meter stick.) What is the unknown mass? m1 = 48.0 g x1 = 37.0 cm m2 = 87.8 g x2 = 95.5 cm m3 = ? x3 = 38.7 cm 29.Three masses are hanging from a meter stick, balanced about its center. The masses and positions on the mater stick are given. (Note this are position as read on the meter stick.) What is the unknown position on the meter stick? Answer in cm, and keep at least three significant digits. m1 = 56.0 g x1 = 30.5 cm m2 = 71.7 g x2 = 85.9 cm m3 = 67.6 g x3 = ? 30.Three masses are hanging from a meter stick, balanced about its center. The masses and positions on the mater stick are given. (Note this are position as read on the meter stick.) What is the unknown position on the meter stick? Answer in cm, and keep at least three significant digits. m1 = 33.0 g x1 = 32.8 cm m2 = 73.1 g x2 = 91.9 cm m3 = 63.8 g x3 = ?