125 Newton's Second Law Lab - Summer SPH3U Name: Introduction Consider the set up shown below: additional masses cart track pulley motion sensor labquest ranging mass The system (cart + additional masses + hanging mass) accelerates forward along the track. The expected net force that is accelerating the system is gravity acting on the hanging mass. Fnet = Fg(hanging) If we keep the hanging mass constant, and increase the mass of the system by adding masses to the cart, we can investigate the effect of mass on acceleration, for a constant force. Purpose To investigate the effect of mass on acceleration. Hypothesis Write your hypothesis here: AS MASS INCREASES, THE ACCELERATION WILL DECREASE Materials cart masses electronic balance string optically encoded track and motion sensor labquest 2Procedure 1. 2 3. 4 .01 8. 9. 10. 11. Set up the materials as shown above. . Set the hanging mass to ~1009, and measure it more accurately. Measure the mass of the cart. Ensure that the Iabquest and motion sensor are set up, communicating with each other and working properly. Press PLAY on the Iabquest and release the cart. Ensure that the cart does not crash into the pulley. On the vt graph, identify and highlight the \"good" data. Ensure not to include anything too close to the ends of the good data. From the ANALYZE menu choose CURVE FIT. From the CURVE FIT screen, under COEFFICIENTS, choose LINEAR. good data \\\\ III I! - The Iabquest will display the linear coefficients - m is the slope, which on a vt graph represents... Record the system mass and acceleration in your data chart. From the TABLE screen, select the TABLE tab and choose "CLEAR ALL DATA". Increase the mass of the system by adding mass to the cart (in 50-1009 increments). Measure the mass added, and record the mass of the entire system. Repeat steps 5-10 until enough data is collected (minimum 6 rows) Observations (Mass Of System (kg) Acceleration (m/sz) Net Force (N) mcart + madded + mhanging) \" \" ama 1.5?96 1.15% Analysis 1. Plot two graphs - acceleration vs mass (fit a curve), and acceleration vs 1/mass (fit a straight line). [8] 2. Draw a free body diagram of the cart, and a separate free body diagram of the hanging mass. [4] 3. Qualitatively describe the relationship between mass and acceleration. [2] 4. Calculate the expected net force: [1] Fnet exp. = mhangingg : 5. Calculate the slope of the acceleration v5 1lmass line. What does the slope represent? [2] 6. Calculate the average net force. How does this value compare to the expected net force? Calculate the "/0 difference between the average and expected net force. [3] Note: % difference = 1M X 100 7(A+B) 7. Briefly explain why the observed and expected net force are different. [2] 8. How does adding more mass to the cart effect tension in the string? Briefly explain why this happens. Hint consider the free body diagram of the hanging mass, and what's happening to acceleration. [3]