Lab 09 Hooke's Law lab - Online Name: ________________

The purpose of this simulation lab is to investigate the relation between the amount of applied force and the stretched distance of a spring.

Each time you pull on the spring, a random maximum force will be used to pull the spring.The spring length, before the force is applied and when the maximum force is reached, is read on the ruler. The force applied by the hand is measured with the force sensor and is estimated from the Force vs Time graph.

Procedure

1. Go to the Elastic Force Lab site at https://www.thephysicsaviary.com/Physics/Programs/Labs/ForceElastic/
2. Click on Begin to start.
3. On the window you will see the lab equipment setup. You can click on Spring Number to change the spring used. Select Spring Number 1.
4. Record the spring length X₀ when no force applies on the spring.
5. Click on Start to pull the spring until the applied force can no longer stretch the spring and the motion stops. The force is the maximum force on the string for this run.
6. Read and record the spring length (X). This is the spring length when the maximum force pulls on it.
7. On the graph below you will see the Force vs Time graph. Read/estimate and record the maximum force.
8. Click on Reset.
9. Click on Start button to repeat steps #2 to #8 but this time a new maximum force is applied. Repeat the procedure to obtain data for 10 runs and complete the data table. (Note: Read and record the measurements with at least 2 significant figures. Use SI units in the data table.)
10. Calculate spring constant using Hooke's law for each run and enter the result in the last column of the data table. Find the average spring constant of these 10 runs.
11. Plot Force vs Stretched Length graph.
12. Find the best fit line. Display the equation on the graph. Compare the slope of the line to the average spring constant calculated below. (Use Excel or any other graphing application that finds best fit equation.)
13. Repeat the same procedure for another spring of your choice. Record data and plot the graph, compare the slope and the average calculated spring constant.

First spring.

Spring number: 1 Natural length = ____________ (m)

Run	Max Force (N)	Spring length X (m)	Stretched length (X - X0 ) (m)	Spring constant k (N/m)
1
2
3
4
5
6
7
8
9
10
			Average =

Second Spring

Spring number: ___ Natural length = ____________ (m)

Run	Max Force (N)	Spring length X (m)	Stretched length (X - X0 ) (m)	Spring constant k (N/m)
1
2
3
4
5
6
7
8
9
10
			Average =

Questions

1. In the simulation the force is the force exerted by the hand. What is the force exerted by the spring on the string?

1. Is the shape of the graph a linear function? If so, what is the relationship between the force and the stretch?

1. What is the physical quantity represented by the slope of the force vs distance graph?

1. What is the relationship between the force exerted by a spring and the stretch of the spring?

Lab Report:Use this document as template to fill in data, attach graphs, and answer the questions. Submit the report in Word format to Canvas.