Lab #11- Friction (P&D)

Problem statement: Plan and design an investigation to find out how friction changes with the smoothness or roughness of the surface an object is moving along.

Theory: Write in a paragraph the answers to the following questions:

1. Define the term force.

2. Define the term friction.

3. State the direction in which friction acts.

4. Does friction only occur between solid objects? If yes, state other ways in which friction can occur.

5. At what point does the frictional force increase and when does it decrease?

Hypothesis: (Write a testable statement based on the problem statement above that tells what the outcome of problem will be and give reason to support your stance.)

Aim: (This tells the purpose of the experiment and is related to your hypothesis)

Apparatus & Materials: (Write down all the apparatus and materials that you will need for the experiment. You can fill them in after writing your method.)

Diagram: (optional)

Variables:

Manipulating (Independent) variable: (the quantity that is changed by the researcher or yourself during the experiment).

Responding (Dependent) variable: (the quantity that changes when the manipulating changes or the quantity that you measure in the experiment).

Control variable: (the quantity or quantities that remain constant or the same throughout the experiment).

Method: (In the correct order, write down the steps that should be followed to carry out or complete the experiment).

Expected Results: (State what data you expect to collect. You can list the quantities that will be collected and show how you will represent the data you collect eg. by drawing a blank table with the quantities/table headings or graphs etc.).

Limitation: (State any factor that may prevent you from obtaining or getting accurate results.)

Compiled by Mr. K. Waite