**
course Phy 201
Acceleration vs. ramp slopeIf you missed class today you can easily complete this experiment by staying an extra 5 minutes or so next time. It's a familiar situation (ramp supported by a domino lying flat, then on its long side, then its short side). You will be asked to calculate the acceleration of the ball and the slope of the ramp, create a three-point graph, and calculate two graph slopes.
By lining up dominoes in their proper orientation, as demonstrated in class, determine the slope of your ramp when supported by a domino lying flat, then lying along its longer edge, then along its shorter edge.
Using your pendulum in the manner you deem most accurate, take observations necessary to find the acceleration of the ball on each ramp. Try to determine the time down the ramp as accurately as possible.
Give your data and an explanation of what they mean:
With the domino laying flat I got 3.5 ticks. Length 29
With the domino laying on its side I got 2.5 ticks. Length 11.9
With the domino standing up tall I got 1.5 ticks. Length 5.9
The pendulum was 20cm long in all trials.
&&&&
Graph acceleration vs. ramp slope and give the three graph points you get as a result of your analysis of the data.
Acceleration=average velocity/time elapsed
2.36,8.28
1.904,4.76
2.62,3.93
I can't connect your acceleration to your data.
Ramp slopes are all less than 1.
&&&&
Find the slope between the first and second point on your graph.
11.9-29=-17.1
2.5-3.5=-1
-17.1/-1=17.1
&&&&
Find the slope between the second and third point on your graph.
5.9-11.9=-6
1.5-2.5=-1
-6/-1=6
1.5 and 2.5 aren't coordinates on your graph of acceleration vs. ramp slope; these calculations don't seem to correspond to your graph
&&&&
What do you think is the uncertainty in your time measurements?
Within a couple of centimeters
&&&&
What do you think is the percent uncertainty in each of your time measurements?
Around 2 %
&&&&
What do you think is the percent uncertainty in each of your calculated accelerations?
1-2%
&&&&
What do you think is the percent uncertainty in each of your slopes?
3-8%
&&&&
When you analyze your data for this experiment:
For what object are you calculating the acceleration?
I am calculating the acceleration of the ball rolling down the ramp
&&&&
What events define the beginning and the end of each time interval you are measuring?
Letting go the ball and the starting of the pendulum swing is the start of the interval.
As soon as the ball goes off the ramp is the end of the time interval.
&&&&
Where is the object at the beginning of the interval and where is it at the end of the interval?
The object is at the top of the ramp and you are having to hold it.
The object is off the ramp at the end of the interval.
&&&&
What is the displacement between those positions?
&&&&
Does the displacement depend in any way on the length of the pendulum?
Yes because the longer the pendulum the more accurate you can get the time.
that can affect the accuracy of your timing, but it doesn't affect how far the ball travels from one end of the ramp to the other
&&&&
What information do we get from the length of the pendulum?
We get the length of the pendulum, time interval with the length we can also get the rise.
&&&&
"
&#See my notes and let me know if you have questions. &#