Linear Kinetics 2 Flashcards
What are the steps of drawing a free body diagram?
- Isolate body of interest and draw stick figure with COM
- Insert coordinate axes
- Add external forces as vector arrows
- Assume direction of any unknown forces
- Set up EOM and solve (F=ma)
Forces can either be _____ or_____
Push or pull
Resultant vector
The net vector of the individual vectors together
Resolved vector
The individual x and y component vectors
Where should resolved vector be maintained?
At the point of contact with the object
Push= heads at POC
Pull= tails at POC
Review the graphs for vertical and horizontal motion in x and y
See slides
If you perform an exercise faster, how will the graphs change?
Hills and valleys will be higher for acceleration
If you perform an exercise really slowly, how will the graphs change?
Acceleration gets closer to 0 horizontally and converge to the weight of the object vertically
Quasi-Static
Motion so slow that the acceleration can be ignored in the EOM
What variables (equation) is the inertia force equal to?
ma
What is the final and initial velocities over the first half of the vertical up phase of a BB bicep curl?
Final velocity: +
Initial velocity: 0
What is the final and initial velocities over the first half of the vertical down phase of a BB bicep curl?
Final velocity: -
Initial velocity: 0
What is the net impulse over the first half of the vertical down phase of a BB bicep curl?
-
How does the force of the hand compare to the weight of the barbell during the first half of the vertical up phase of a BB bicep curl?
Force>Weight
What is the final and initial velocities over the second half of the vertical up phase of a BB bicep curl?
Final Velocity: 0
Initial Velocity: +
What is the net impulse over the first half of the vertical up phase of a BB bicep curl?
+
How does the force of the hand compare to the weight of the barbell during the first half of the vertical down phase of a BB bicep curl?
Force<Weight
What is the final and initial velocities over the second half of the vertical up phase of a BB bicep curl?
Final Velocity: 0
Initial Velocity: +
What is the net impulse over the second half of the vertical up phase of a BB bicep curl?
-
How does the force of the hand compare to the weight of the barbell during the second half of the vertical up phase of a BB bicep curl?
Force<Weight
What is the final and initial velocities over the entirety of the vertical up phase of a BB bicep curl?
Final velocity: 0
Initial velocity: 0
What is the net impulse over the entirety of the vertical up phase of a BB bicep curl?
0
How does the force of the hand compare to the weight of the barbell during the entirety of the vertical up phase of a BB bicep curl?
Force=Weight
What is the final and initial velocities over the second half of the vertical down phase of a BB bicep curl?
Final Velocity: 0
Initial Velocity: -
What is the net impulse over the second half of the vertical down phase of a BB bicep curl?
+
How does the force of the hand compare to the weight of the barbell during the second half of the vertical down phase of a BB bicep curl?
Force>Weight
What is the final and initial velocities over the entirety of the vertical down phase of a BB bicep curl?
Final velocity: 0
Initial velocity: 0
What is the net impulse over the entirety of the vertical down phase of a BB bicep curl?
0
How does the force of the hand compare to the weight of the barbell during the entirety of the vertical down phase of a BB bicep curl?
Force=Weight
