Kinesiology 2241A/B Lecture Notes - Lecture 11: Centripetal Force, Angular Velocity, Bobsleigh
Course CodeKinesiology 2241A/B
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Angular Kinetics, Torques, Moments, Levers
= Causes of Angular Movement
How things move in a circle, how things rotate, what you see, position displacement velocity
when things move around a circle
● Force causing centripetal acceleration, curvilinear path
● Fc=M*W^2*r(kg m/s^2)
● Draws an object to center of rotation.
● Object wants to stay in certain path unless force acts upon it. Newton’s laws.
● 3 components:
- Mass of object
- Square of angular velocity
- Radius at which it works
If all three are larger it creates more centripetal force
● Center fleeing force
● Is equal and opposite to centripetal
● Has the same magnitude and dimensions but in opposite direction
Forces in Action
- Forces act in ways that come in different shapes forms and sizes.
- Friction, try to minimize
- Wind resistance, fluid drag (amount of force created by wind)
- Centripetal, pulls toward an axis of rotation.
- Centrifugal, pulls away from an axis of rotation.
Torque Defined ( AKA Moment)
● Force causing rotation
● Causes a system/body to rotate
● Torque is just an angular force
● T= FxFA
● Force measured in N
● Force arm is measured in M, amount of distance between force application and pivot.
● Torque measured in Nm
● Big torque= increase in force generated, or increase in force arm
Properties of a Force
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