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Transcript
Newton’s second law of motion Assignment To verify Newton’s second law of motion using a tickertimer, weights and a small trolley. The second law of motion can be written F=m·a W here F : F orce m : mass a : acceleration I.e. To accelerate an object a force in needed, this force is proportional to the acceleration, and the constant of proportionality is m. the mass of the object. Experiment In this experiment your going to use a weight with mass m kg to accelerate a trolley weighing M kg. The movement of the trolley is recorded using a tapetimer. Ticker tape timer Trolley M kg m kg Figure 1: Experimental set up 1 • Use the tape gained to make a velocity time graph. (Details of how to do this are found in the physcis book Making a tapechart Page 8-9. Try to think through how you would do this before you arrive at the lab on friday) • Determine the acceleration using the velocity time graph. Remember the acceleration is the slope of the velocity-time graph. • Repeat procedure with different weights. • Verify the law of motion by completing the following table, if F = (m + M )a then the law of motion is valid for our experiment. m+M Measurement Measurement Measurement Measurement a F 1 2 3 4 2 = (m + M )a = = = =