physics lab-see attachment

1. When you pull clothes out of the dryer, sometimes they stick together. What do you think might explain why they stick?

2. What do you think happens in the dryer that makes the clothes stick together?

3. The pictures below show positive and negative circles. The negatives are stuck in place, but the positive is free to move:

A B C

a. For each picture above, draw arrows on the positive circle ( ) to show which way you think it will move.

b. In which picture below, do you think the positive circle would go the fastest? (Circle your answer)

A B C

Why?

__________________________________________________________________________

__________________________________________________________________________

4.

In the pictures below, the middle positive “pucks” are free to move, and have some positive and negative circles are stuck down on either side of them.

For each case (A, B, and C), do you think the middle positive “puck” will move or not move?

If the puck will move, draw an arrow on the “puck” to show which way you think it will move.

If the puck won’t move, write that down.

5. Moving balloons?

In the picture below, the balloons on the left and middle are held in place. The right balloon is free to move.

Is it possible to add positives or negatives on the free balloon that would make it move to the left (  )?___________

If so, then drawpositives or negatives on the balloon that would make it move, and explain why you think it would work? __________________________________________________________ _______________________________________________________________________________ ______________________________________________________________________________

If is not possible, explain why?______________________________________________________

LAB REPORT FORMAT:

Objective: State what you want to achieve in this experiment. A formal way to do

this is to state a question or hypothesis that you want to address.

Method: You should include a summary of the lab procedure in your words; do

not merely copy what is in the manual. This section should demonstrate your

understanding of what exactly you measured and how you measured it.

Data: In this section you should include the raw data you measured; generally, an

estimate of the error should accompany all measured values. Be sure to present

your data in an organized manner (e.g. a data table) and to include units.

Data Analysis: In this section you will manipulate the data in order to help you

address your question or hypothesis. Usually this entails performing calculations

and/or creating graphs of the data.

Uncertainty & Error: You cannot draw any final conclusions from your data

until you think carefully about how well you can trust your data and what factors

may have affected or biased it. Additionally, you must often propagate the error

from your measurements through your calculations and graphs.

Conclusion: Finally, after all this work, go back and answer the question you

stated in the beginning. Does your data allow you to support or reject your

hypothesis, or is the data inconclusive? Also do you have anything you can

compare your results with (e.g. a value in the literature, a second measurement, a

measurement with a different method, other lab groups)? How well does it

compare to such a value?

2

Negative CircleStuckPositive CircleStuckPositive “puck” Free to move

Case ACase B Case CExplain why?Explain why?Explain why?