Please help me with this physics lab.

Name: Lab Section/Instructor: Date: LAB EXPERIMENT: PERIOD OF A SIMPLE PENDULUM Lab Partners: Laboratory Results and Analysis Table: Complete the table below. Fill in values for tio for each trial done at each pendulum length For each line, calculate to 2 decimal places (hundredths place): The average tze at this length Use this average tio to find the time for one swing T (divide by 10) Use T to calculate Ta Use this value of T2 to find g, using the formula from the introduction sheet Find the percent difference between your value of g and the accepted value 980 m/s Length Time for 10 swings Average T2 g % Trial 1 Trial 2 Trial 3 t20 Difference 20 cm 40 cm 60 cm 80 cm Average Average of average T: Average of average T2: Average g: Average percent difference: Show a sample calculation in the space below for determining g and the percent difference, Use Excel to construct the following graphs (Please think about what variable should go on the x and y axes) Graph #1: T (period) vs. L (length of pendulum) [HINT: This is not a straight line; use a function that will give you a best fit curve. Also, select to show the equation] Graph #2: T' (period squared) vs. L (pendulum length) Questions and Analysis a) Using your graph determine the length of a pendulum whose period is 1 second.1 of 4 Instructor: Date: LAB EXPERIMENT: PERIOD OF A SIMPLE PENDULUM INTRODUCTION A simple pendulum consists of a string of length L fixed at one end, and a bob (a small dense mass) suspended from the other. The period of a pendulum is the time it takes the pendulum bob to swing back and forth. In this lab, we will: Show that the period of the simple pendulum is directly proportional to the square root of the length of the string. Determine the length (graphically) of the pendulum that has a period of 1 second. Calculate the acceleration due to gravity using our pendulum data. The mathematical expression for the period of a pendulum is: T = 2x - where L is the length of the pendulum string and g is the acceleration due to gravity. Solving for g, we get: g = 4x EXPERIMENT 1. Procedure 1 a) Adjust the string so the length of the pendulum is 20 cm. b) Start the bob swinging through a small angle (no more than 159) c) Using the stopwatch, measure the time (in seconds) for 10 complete periods (t10 swings) d) Use to to find T, the period of the pendulum (the time for one complete cycle) e) Using the equation given in the introduction, use your value of T to find g, the acceleration due to gravity. Use the percent difference formula to compare your value for g with the accepted value, 980 cm/s'. If this is more than 5%, measure the length of the pendulum and the time for 20 periods. f) When your value of g is close to the accepted value, record your time in the chart below. Now, repeat two more times, finding 10 swings a total of three times. L=20cm Trial 1 Trial 2 Trial 3 Time for 10 complete swings (t10 swings) 2. Procedure 2: Repeat the procedures in experiment 1 for a pendulum of length 40 cm. Use the first value of tio to find T, then calculate g and see if you are in the correct range. Record your values below: L=40cm Trial 1 Trial 2 Trial 3 Time for 10 complete swings (t10 swings) 3. Procedure 3: Repeat the procedures in experiment 1 for a pendulum of length 60 cm. Use the first value of tio to find T, then calculate g and see if you are in the correct range. Record your values below: L=60cm Trial 1 Trial 2 Trial 3 Time for 10 complete swings 10 swings) 4. Procedure 4: Repeat the procedures in experiment 1 for a pendulum of length 80 cm. Use the first value of tio to find T, then calculate g and see if you are in the correct range. Record your values below: L=80cm Trial 1 Trial 2 Trial 3 Time for 10 complete swings ([10 swings)