Experiment 2: Newton's Third Law and Force Pairs Table 3: Force on Stationary Springs Force on Stationary 10 N Spring Scale (N) 5.20 N Force on Stationary 5N Spring Scale (N) 5 N Table 4: Spring Scale Force Data Force (N) on 10 N Spring Scale Force (N) on 5 N Spring Scale 4N 4N Suspension Set Up 0.5 kg Mass on 10 N Spring Scale 0.5 kg Mass with String on 10 N Spring Scale 0.5 kg mass, string and 5 N Spring Scale on 10 N spring scale 0.5 kg mass, string and 5 N Spring Scale on 10 N spring 8N 6.5 N 6N 6N straighterline Lab 3 Newton's Laws PHY250L scale on Pulley 'n Focus POST-Lab Questions 1. How did the magnitude of the forces on both spring scales compare after you moved the 10 N spring scale? Click here to enter text. 2. How did the magnitude of the forces on both spring scales compare after you move the 5 N spring scale? Click here to enter text. 3. Use Newton's Third Law to explain your observations in Questions 1 and 2. Click here to enter text. 4. Compare the force on the 10 N spring scale when it was directly attached to the 0.5 kg mass and when there was a string between them. Click here to enter text. 5. Compare the force on two spring scales in Steps 5 and 6. What can you conclude about the tension in a strong? Click here to enter text. 6. Olympic spring Usain Bolt set the world record in the 100 meter dash with a time of 9.58 seconds. The physics behind his performance are impressive. Physicists have modeled his position as a function of time to be as follows: B Aelt +B X(0) = -In A+B k A+B A+ Be- where A=110 m/s, B=12.2 m/s, k=0.9 1/s. Using this information, find his acceleration when t = O seconds. If his mass was 86 kg at the time of the race, what was his force at t = 0 seconds. What was the force from the ground on Bolt at t = 0 seconds? Click here to enter text. Insert photo of your experimental setup with your name clearly visible in the background: Experiment 3: Newton's Third Law and Force Pairs Table 5: Motion Data Mass of 15 Washers (kg) 45 kg 3 kg Average of Mass of Washer (kg) Procedure 1 Height (m): 1.038 m Trial 1 2 3 4 5 Average Average Acceleration (m/s) Time(s) 3.87 3.5 3.6 3.66 3.63 3.65 Click here to enter text. Procedure 2 Height (m): 0.983 m Trial 1 2 3 Time(s) 1.02 .99 1.0 1.13 .98 1.03 Click here to enter text. 4 5 Average Average Acceleration (m/s) Post-Lab Questions 1. Draw a free body diagram for M, and Mz in Procedure 2. Draw force arrows for the force due to gravity acting on both masses (Fg and Fgz) and the force of tension (Ft). Also draw arrows indicating the direction of acceleration, a. 2. Use Newton's Second Law to write an equation for each of the free body diagrams you drew in Question 1. Be sure to use the correct signs to agree with your drawings. Solve these four equations for the force of tension (Ft). Your answer should be written in variable form. Click here to enter text. 3. Set the two resulting expressions for the force of tension equal to one another (as long as the string does not stretch, the magnitude of the acceleration in each equation is the same). Replace Fg and Fgz with Mand Mz, respectively. Solve the resulting equation for a. Then, go back to Questions 2 and solve for the Ft. Click here to enter text. 4. Calculate the acceleration for the two sets of data you recorded and compare these values to those obtained by measuring distance and time using percent error. What factors may cause discrepancies between the two values? Click here to enter text. 5. Calculate the tension in the string for the falling washers. From these two values, and the one where the masses were equal, what trend do you observe in the tension in the string as the acceleration increases? Show all calculations. Click here to enter text. 6. Using the theoretical acceleration found in Question 4 for Procedure 1, find the velocity of the block as a function of time by integration. Click here to enter text.
Purchase answer to see full attachment