Angular motion Flashcards
1
Q
what is angular motion?
A
angular motion is movement around a fixed point or axis.
- it occurs when a force is applied outside the centre of mass
2
Q
what is angular displacement ?
A
the change in angle between the starting point and ending point, measured in radians
3
Q
what is angular velocity ?
A
the rate of change of angular displacement. measured as radians/s
4
Q
what is angular acceleration ?
A
the rate of change of angular velocity. measured by radians/s squared.
5
Q
what is moment of inertia?
A
the resistance of a body to angular motion. Kg m2
6
Q
what 2 factors does the moment of inertia depend on ?
A
- mass of the body
- distrobution of mass around an axis
7
Q
how can a gymnast increase angular velocity?
A
by bringing their mass towards the axis of rotation by changing the shape of their body (tuck in)
