Thursday, November 20, 2008 - Block 4A

Quick review on motion

We started with graphical approach by doing the Act-A-Graph lab. This allowed us to plot various types of motion (moving towards, away, at rest, constant speed, changing speed (slowing down, speeding up).

We saw that objects at rest have a horizontal line on a distance vs time graph.
Objects that move at constant speed have a straight line. The steeper the slope, the faster the speed.

If there is a curve, the object is changing speed. By looking at the slopes we can tell if the object is speed up (slopes get steeper) or slowing down (slopes get shallower).

We then used the circle equation to solve problems.
How far? asks for a distance (units like m, cm, miles)
How fast? asks for a speed (units like m/s, miles/hour)
How long? asks for a time (units like s, min, hour)

We used the problem solving strategy to solve problems.

Today, apply knowledge of motion to motion of ball rolling down an inclined ramp.

Content Objectives:
Student will be able to
. Describe in words the motion of a ball rolling down a ramp.
. Graph this motion using all the elements of a good graph and use the graph to describe the motion of the ball down the ramp.

Showed the set up and where the equipment was located. Please return all equipment to initial location when done with lab. Students worked in groups of 2 or 3. Some students waited until others had finished. Three groups worked in hall.

Ramp 6 was damaged in the last lab but we used it anyway.

Students did lab, graphed data, and handed in completed lab sheet.