Physica Lab

Suellen Fonseca Physics 151 April 3, 2013 Questions and autonomic nervous systemwers 1. pose analogous airman motion. ? A. Is an object in uniform circular motion accelerating? ? B. Define centripetal quickening, and state its magnitude and direction. (2. 0 points) Ans An object abject at a constant amphetamine just about a circular path is performing a uniform circular motion. The objects path is considered to be tangent to the circle due to the fact that it is everlastingly changing position as it goes around the circle.Therefore the velocity would as well as be tangent to the circle. A The object in uniform circular motion is experiencing acceleration due to the fact that is it changing direction constantly. B This is the centripetal acceleration. Its say towards the center of rotation. Is magnitude is calculated by V2r where v is the tangential velocity and r is the universal gas constant of rotation 2. A car is driven around a circular drag. Which would have a greate r effect on the magnitude of its acceleration, multiply the speed or moving to a track with half the radius?Please show your proof or calculations. (1. 0 point) A. Define centripetal pull in (F c) ? B. Which object is providing the centripetal force in this look into? Ans Cense acceleration is given by V2r doubling the velocity has a greater effect then dividing the radius by 2. A The force the supply the acceleration is called centripetal force. This force is also perpetually directed towards the center of rotation. B The object providing the centrifugal force in this experiment is the tention in the rope. 3.When you go around a corner in a car, do you feel centripetal or centrifugal (Fg) force ? performing upon you? (1. 5 points) Ans The car is experiencing centripetal force thus it does not fly of the streat. 4. Explain why ? F=mg? =? Fc=4? 2 M f 2 r? in our experiment. (0. 5 point) Ans It worked because the balancing force is the tetion In the string which allows the wheigh t to move in a circle. 5. List the data and sample calculations obtained in lab. (0. 5 point) r (meter) m (kg) f (sec-1) a_c = 4(? 2)(f2)r (m/s2) F_c = mg (N) 1 0. 49 0. 4 1. 271 9. 502 3. 92 2 0. 16 0. 45 1. 348 11. 478 4. 41 3 0. 175 0. 55 1. 416 13. 852 5. 39 4 0. 197 0. 79 1. 608 20. 109 7. 742 6. Plot the graph of Fc vs. ac . A. What is the anticipate slope of the line graphed (and explain why you dribble this result)? B. Calculate the veritable slope of stovepipe fit line. Also calculate the percent fault for the slope, and ? state and explain the sources of error. (4. 5 points) A the expected slope id 0. 4 B the unfeigned slope from the best fit line is 0. 106. One sores of errow would be the time of the number of revolutions. An erro on the radius mesurament Uncertainty Slope 0. 01522 y-intercept 0. 2177 7. What do you expect the y-intercept of the line from question 6 to be? Find the actual y-intercept for your best fit line. (show calculations) (1. 0 point) 8. Im agine that a much harder leak (spring with higher(prenominal) spring constant k) is used in the experiment. Explain how the centripetal force F c and the period f of the hanging mass leave change. i. e. if they will increase or decrease) (1. 0 point) Ans If we had a harder spring the frequency would be bigger therefore the centripetal force would also be bigger. Conclusion In this lab we were trying to prove that fc=mg. agree to my calculations the results were close but not perfect. This can be because of lost of goose egg due to friction or simply error in calculations. As predicted every time there was a change in radius or the frequency the centripetal force changed.