Question

Student submitted the following table and along with it a graph.

Suppose a student submitted the following table and accompanying graph Newton's 2nd Law Lab Graph 0.015 0.035 0.055 0.095 0.135 0.0654 0.1927 0.1271 0.1018 0 0.98 0.338 0.754 1.135 0.52 0.79 22.529,k E 2.250 1.53 1208- 0 1.53 2.384 1.27 을 1.250 a. The upper straight line is what the student should have obtained and 02 0.250a 0.01 0.06 0.11 plotted. The lower curved line matches the data in the above table What about the graph allows you to recognize that an error has been made? Hanging Mass m2 (kg) Consider the experimental procedure and the required calculations. Make a suggestion for the error that was made. Justify your answer. b.

Answer 1

a) we know from our knowledge that a straight line should be obtained, where as at higher value of cross a curve is coming which deviates down, which clearly shows that then the slope wouldn't be constant b) i) At for higher velocities eg (v = 1.53, t = 0.0654), the time would be considerably small and hence more precision in the measurement of time is required. ii) Experiment should be performed for small oscillation iii) We know drag force = -bv therefore at higher velocities this drag force increases, moreover for more mass the surface area would also be more hence b will increase therefore velocity would decrease due to an opposing force.