Momentum Blog
The Idea:
This weekend I was out skiing with my parents and we came across a bar that had a shuffleboard. Automatically my mind thought of momentum because in order to knock someone else's puck out of the way you have to apply the right force to give it the velocity it needs to collide with the other puck and knock it out of the triangle. However, this one group of people just kept hogging the shuffle board table, so this inspired me to play an outdoor game with a similar concept. So my dad and I headed outside to play some bocce.
Video Analysis
From Logger Pro I gathered 3 scenarios of data. I got the velocities of the bocce ball when it was in the air as a projectile, then I got the velocity from when the first bocce ball hit the ground to after it collided with the ball, and lastly I got velocity of the ball that started from rest. However, I decided to use the velocity from when the first bocce ball hit the ground as my initial velocity for my math.
After looking at my tables to get the data for my velocities I decided that I could get an average velocity of the data if I graph a position versus time graph for both the green and red balls for the initial and final velocities.
This weekend I was out skiing with my parents and we came across a bar that had a shuffleboard. Automatically my mind thought of momentum because in order to knock someone else's puck out of the way you have to apply the right force to give it the velocity it needs to collide with the other puck and knock it out of the triangle. However, this one group of people just kept hogging the shuffle board table, so this inspired me to play an outdoor game with a similar concept. So my dad and I headed outside to play some bocce.
Video Analysis
From Logger Pro I gathered 3 scenarios of data. I got the velocities of the bocce ball when it was in the air as a projectile, then I got the velocity from when the first bocce ball hit the ground to after it collided with the ball, and lastly I got velocity of the ball that started from rest. However, I decided to use the velocity from when the first bocce ball hit the ground as my initial velocity for my math.
Table 1. Velocity of the bocce ball from when it hits the ground to when it collides with the ball
Position of the green bocce ball during before and after collision
Graph 1. Green Bocce Ball Position v. Time
Initial Velocity= 1.503 m/s
Graph 2. Green Bocce Ball Position v. Time
Initial Velocity= 0.97 m/s
Red Ball's Initial Velocity= 0 m/s
Graph 3. Red Bocce Ball's Position Versus Velocity
Initial Velocity= 0.001
Data Analysis:
Brocce Ball= estimated mass is 920 kg *researched average weight*
MrVr + MgVg= MrVFr+ MgVFg
Kinetic Energy Lost:
.5MrVr^2 + .5MgVg^2= .5MrVFr^2+ .5MgVFg^2
.5 (920)(0)^2 + .5(920)(1.503)^2 > .5(920)(.97)^2+ .5(920)(.001)^2
1039.14 > 432.81
Kinetic Energy Lost: 606.33 J
Variables:
After doing the activity I realized that the data result would be greatly affected by friction. Since the graph is an extremely uneven ground. This was made extremely apparent after the collision because the red ball did not move a lot. The force of friction could have really affected the velocities. If I was to do it on a more even surface you could still see that kinetic energy was lost in the collision.
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