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Biomechanics test 2
Question | Answer |
---|---|
What is kinematics ? | The form, pattern or sequencing of movement with respect to time. |
What is Liner displacement | Change in location, or the directed distance from initial to final location. |
What is speed? | The rate you cover a distance |
What is linear velocity ? | The rate of change in location |
T/F Distance covered and displacement may be equal for a given movement ? | True |
What is linear acceleration ? | The rate of change in linear velocity |
When acceleration is zero what is velocity ? | Constant |
What is instantaneous ? | Occurring during a small interval of time M |
What is average ? | Occurring over a designed time interval |
What are projectiles ? | The body in free fall that is subject only to the forces of gravity and air resistance. |
What is the apex? | The highest point in the trajectory of a projectile |
What is trajectory | The flight path of a projectile. |
What is the angle of projection? | The direction at which a body is projected with respect to the horizontal. |
What is projection speed? | The magnitude of projection velocity |
What is range? | The horizontal displacement of a projectile at landing. |
What is relative projection height ? | The difference between projection height and landing height. |
What is initial velocity ? | Vector quantity incorporating both angle and speed of projection. |
T/F the vertical speed of a projectile is constantly changing because of gravitational acceleration? | True |
T/F the horizontal acceleration of a projectile is always zero? | True |
What are the Laws of constant acceleration? | Formulas relating displacement, velocity, acceleration, and time when acceleration is unchanging. |
What is the relative angle ? | Angle at a joint formed between the longitudinal axes of adjacent body segments. |
What is Absolute angle ? | Angular orientation of a body segment with respect to a fixed line if reference. |
What are 3 units to measure angles in ? | Degrees, radian, revolutions or rotations |
What is the instant center? | Percisely located center of rotation at a joint at a given instant in time. |
What is angular distance ? | The sum of all angular changes undergone by a rotating body/segment. |
What is angulr displacement ? | Change in the angular position or orientAtion of a line segment. |
Which direction is regarded as positive ? | Counterclockwise |
Which direction is reguarded at negative? | Clockwise |
What is A radian? | Unit of angular measure used in angular-liner kinematic quantity conversions; equal to 57.3 degrees |
What is angular velocity? | Rate of change in the angular position or orientation of a line segment. |
What is Angular acceleration ? | The rate if change in a angular velocity |
What is the right hand rule? | Procedure for identify g the direction of an angular motion vector. |
What is the radius of rotation? | The distance form the axis of rotation to a point od interest on a rotating body. |
T/F the larger the radius of rotation the greater the linear distance traveled by a point on a rotating body. | True |
What is tangential acceleration? | Component of acceleration of a body in angular motion directed along a tangent to the path of motion; represents change in linear speed. |
What Is radial acceleration? | Component of acceleration of a body in angular motion directed toward the center of curvature; represents change in direction. |