Chapter 3 Vectors: Two Dimensional Lab, Ball Toss (projectile) and Ramp.

We will use a movie clip that you will create and Logger Pro to analyze horizontal and vertical motion independently.

Ball Toss

Film you and a partner tossing a small dark ball in a nice projectile which can be captured on the camera. MAKE SURE that you have a reference length the same distance from the camera as the ball’s motion. We will hang a string from the ceiling with flags exactly 1.0 m apart which you can use to scale your data appropriately. Ms. Lund will load your clip onto her computer and then you can transfer the file to a USB drive to take to your individual computer. Be sure to save your work.

Use Logger Pro to track the motion of the ball. Analyze the behavior of the ball by graphing position vs time and velocity vs time. Use “Insert” to include the velocity graph on the same page as the position graph. Use “Auto Arrange” under “Page” to organize your work. Use “Analyze” to find the equation of each line. Only print when you have both position and velocity graphs displayed along with their accompanying equations.

For the Ball Toss data, find the acceleration due to gravity, and compare to 9.81 m/s/s by finding the % error. (10 pts)

Cart Roll on Ramp

Film a cart rolling up and down a ‘frictionless’ ramp. Use the same vertical reference line as above. You will also want to use a protractor to measure the angle of the ramp or measure the sides of a triangle pictured on the screen. Ms. Lund will load your clip onto her computer and then you can transfer the file to a USB drive to take to your individual computer. Be sure to save your work.

Using the same display of your data as above, find the horizontal and vertical components of the acceleration of the cart. Combine your horizontal and vertical accelerations into a resultant acceleration parallel to the ramp. This value should equal gsin. (you’ll see why later in Chap 4) Using your measured angle. Solve for g, compare your value to 9.81 m/s/s by finding the % error. (10 pts)

Turn in two printed pages showing the position vs time and the velocity vs time for each motion.. On each graph, draw a vertical line through the place on each graph when the ball or cart is at its max height. (2 pts each)

Write a paragraph to accompany each set of graphs that shows me how you know what type of motion is occurring. Be quantitative. Be specific about the entire journey.. (5 pts each)

Comment on the type of errors specific to this lab (3 pts)

Write a thoughtful conclusion about what you took away from this lab. Ie. What was the big picture? (3 pts)

Lab value: (40 pts total)

Name, Date, Block, and all lab partners’ names (first and last) (5 pts)

Graphs (4pts)

Equation of each line with units. Compare to 9.81 m/s2 Show ALL calculations. (10 pts)

Paragraphs (10 pts)

Errors and Conclusion (6 pts)