inclined planes and work day 2
DESCRIPTION
o n e. Objective: To examine data in order to find out how the length of an inclined plane affects the amount of work completed Core Question: How do inclined planes affect work? Drill: Compare your homework answers with your neighbor. - PowerPoint PPT PresentationTRANSCRIPT
Inclined Planes and Work
Day 2
oneSK-15A
Objective: To examine data in order to find out how the length of an inclined plane
affects the amount of work completedCore Question: How do inclined planes affect work?
Drill: 1. Compare your homework answers with your
neighbor.2. Get an Activity Sheet from the SET. (And quiz guide)
3. Read the objective and the Scenario.
Inclined Planes and Work
Day 2
oneSK-15A
Homework Check
Lab Analysis
Inclined Planes and Work
Day 2
oneSK-15A
1. Patterns a. As the height of the incline
increased, the force applied increased.
b. As the height of the incline increased, the amount of work completed increased.
c. The length of the plane remained constant.
Inclined Planes and Work
Day 2
oneSK-15A
2. Reflecting on the Hypothesis
a. Statement of Validity
b. Statement of Hypothesis
c. Explanation w/Evidence
Inclined Planes and Work
Day 2
oneSK-15A
3. Reliable Data
a. Repeated Trials
b. Elimination of Outliers
c. Other???
Inclined Planes and Work
Day 2
oneSK-15A
How will the length of an inclined plane affect the
amount of work completed?
Inclined Planes and Work
Day 2
oneSK-15A
ScenarioYou have just finished exploring how the height of an inclined plane affects the amount of work completed. Another group of students did a different investigation. They explored how the length of an inclined plane affects the amount of work completed. Their data has been collected in the chart, “The Effect of the Length of an Inclined Plane on the Amount of Work Completed.” Figure 1 shows the set up of the class’ investigation. Note that the height of the inclined plane remains constant.
Inclined Planes and Work
Day 2
oneSK-15A
Length of Inclined
Plane (m)
Height of Inclined
Plane (m)
Force Applied
(N)
Work Completed (N-m)
0.5 0.50 5.0 2.5
1.0 0.50 2.5 2.5
1.5 0.50 1.7 2.5
2.0 0.50 1.3 2.5
2.5 0.50 1.0 2.5
The Effect of the Length of an Inclined Plane on the Amount of Work Completed
Inclined Planes and Work
Day 2
oneSK-15A
Small Group Discussion
What do you notice about the work completed? Why does this occur?
The data in the investigation above is theoretical. How would it be different in reality? Why?
Inclined Planes and Work
Day 2
oneSK-15A
Our Fair Friend
FRICTIONInput Work: The work put into the
machineOutput Work: The work the machine doesInput work is always greater than
output work due to friction.
Inclined Planes and Work
Day 2
oneSK-15A
Homework
Analysis Ditto(to be collected)