Name: ____________________________
Group: _____ Date: __________
HOOKE’S LAW
Taken from: http://hyperphysics.phy-‐astr.gsu.edu/hbase/imgmec/hook.gif
GOAL: At the end of the lesson students will be capable to produce a lab report of an experiment, after changing variables, and observing and finding data. AIMS: CONTENT AIM: To calculate the elasticity of several springs. LANGUAGE AIM: To express findings using simple past sentences. CLIL AIM: To make a lab report and to design a power point presentation. LEARNING OBJECTIVE: To compare previous knowledge, a theory and an experiment, through registering data in charts, using this data in presenting a report and share their findings. ASSESSMENT CRITERIA: Students include the report of the lab session, following the structure and organization in class. In this report, they show clearly their findings, comparing with the theory previously taught, and using appropriately grammar structures.
I. WARMING UP Write in your words the meaning of the following terms: • Elasticity: ________________________________________________________________ • Frequency: _______________________________________________________________ • Period: __________________________________________________________________ • Mass: ___________________________________________________________________ • Weight: __________________________________________________________________
II. BEFORE THE LAB SESSION A. Materials Match the pictures with the labels.
Ring stand Various Weights
Timer
Graph Paper Pencil Spring
Camera
Measure tape
B. Consider the following • In this experiment, you hold different masses in the spring to measure how much do they stretch. • You oscillate the spring with different masses to calculate the period and the frequency of movement. • Draw this chart in order to fill the data in.
SPRING Mass (Kg)
Weight (Newton)
Elongation (mt)
Oscillations
Time (sec)
Period (sec)
Period 2 (sec )
2
Frequency (RPS or Hz)
Constant of Elasticity (N/m)
III. LAB SESSION 1. 2. 3. 4.
Hold one mass at a time to measure how much the spring stretches. Do the same with eight different masses. Oscillate one mass at a time ten times and measure the time that each one takes. Do the same with eight different masses.
5. Calculate the constant of elasticity with the equation K =
elasticity, F is weight, and x is elongation.
F , where K is the constant of x
6. Calculate the period of movement with the equation T =
the period.
time , where T is N.Oscillations
7. Calculate the frequency of movement with the equation f =
N.Oscillations . time
IV. ADDITIONAL THINGS TO DO If you have several sets of data, the best way to plot a graph in a histogram form is: • • • •
Plot a graph of Ellongation (side axis) vs Mass (bottom axis). Plot a graph of Period (side axis) vs Mass (bottom axis). Plot a graph of Period2 (side axis) vs Mass (bottom axis). Plot a graph of Frequency (side axis) vs Mass (bottom axis).
V. FINDINGS A. What do you conclude? __________________________________________ B. Now, write your conclusion using SIMPLE PAST: ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________