Flashcards in Biomechanics class test 2 April Deck (29):
What is the formula for limiting friction?
Coefficient of limiting friction x perpendicular reaction force
What is the formula for sliding friction?
Coefficient of sliding friction x perpendicular reaction force
What is the formula for the coefficient of restitution?
What is the formula for radians?
Length of arc/ radius of circle
What is the formula for angular velocity?
Change in angular displacement/ change in time
What is the formula for angular acceleration?
Change in angular velocity/ change in time
What is the formula for a torque?
Force x perpendicular distance from axis of rotation
Moment of inertia x angular acceleration
What is the formula for moment of inertia?
Mass x distance from axis of rotation squared
What is the formula for momentum?
Velocity x mass
What is the formula for angular momentum?
Moment of inertia x angular velocity
The force that arises when one body moves/ tends to move
What does the coefficient of friction depend on?
Material and roughness
When an object is static, is the magnitude of friction equal to the force?
What does rolling friction depend on?
Weight, radius, deformability, coefficient
Ability of body to return to original shape once deformed
What is the coefficient of restitution?
A measurement of elasticity
What s an oblique impact?
When bodies don't collide 'head on'
How can you reduce a force?
Spread over a longer period of time
Define projectile motion
Motion of objects under influence of ar resistance and gravity
Do internal forces change motion of centre of gravity?
Then the release height is the same as the landing height, what is the optimal release height?
What direction does drag act?
In direction of air flow
What direction does lift act?
At right angles to drag
When is an angle formed?
1 line and 1 plane
Is angular displacement vector or scalar?
Is angular distance vector or scalar?
Normally, is a clockwise displacement considered positive or negative?
What to concentric and eccentric forces cause
Eccentric- Angular and linear