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Wednesday, November 21, 2012

Lab #3 – Calculating Work



Work = Force x distance
Work = (Force)(Distance)
W = Fd

Problem
How can a ramp help us pull a heavy object up to a greater height?

Hypothesis

Materials
Ruler, chair, ramp (inclined plane), weights, spring scale, various metallic objects

Procedure

  
Results
Work done without ramp
Object
Force (Newtons)
Distance (cm)
Work (Joules)
50 g Weight



100 g Weight



200 g Weight



500 g Weight



Chemistry Tongs



 Metal Object




 Work done with ramp
Object
Force (Newtons)
Distance (cm)
Work (Joules)
50 g Weight



100 g Weight



200 g Weight



500 g Weight



Chemistry Tongs



Metal Object





Work done with Plastic Map and ramp
Object
Force (Newtons)
Distance (cm)
Work (Joules)
50 g Weight



100 g Weight



200 g Weight



500 g Weight



Chemistry Tongs



Metal Object




Work done with Paper Towels and ramp
Object
Force (Newtons)
Distance (cm)
Work (Joules)
50 g Weight



100 g Weight



200 g Weight



500 g Weight



Chemistry Tongs



Metal Object






ANALYSIS
1)     How did the weight (force pulling down) affect the amount of work done on the object?
2)     How did the distance affect the amount of work done on the object?
3)     Compare/Contrast the trial with the least amount of work to that with the most amount of work.
4)     What is your Independent Variable?
5)     What is your Dependent Variable?
6)     What are your Constants?

Friction Lab Analysis Questions
1)  What is your Independent Variable?
2)     What is your Dependent Variable?
3)     What are your Constants?
4) Which surface had more friction?  Use your Data from the table to prove this. 
 

Conclusion

 What was your problem?
 Restate your hypothesis.  Was it right? wrong?  why or why not?
 What did you learn in this lab?
 What did you like about this lab?
 What were some challenges you had to deal with?
 What could you do next with this problem?  What other tests could you perform?
 Write down any other additional thoughts, observations, inferences, etc.