Advanced Higer Flashcards
Angular velocity
Measure of the angle swept per second
Tangential speed
Linear speed in the direction of the circles tangent
Angular acceleration
Rate of change in angular velocity
Tangential acceleration
Instantaneous linear acceleration at a point on a circle
Centripetal acceleration
Acceleration towards the centre of rotation caused by the centripetal force
Centripetal force
The unbalanced force causing objects moving in a circular path to accelerate towards the circles centre of rotation.
Moment of inertia
Measure of an objects resistance to change in its rotation rate
Torque
The turning effect of a force on a rotating object. An object can be made to turn about its axis by applying a force at a perpendicular distance from the areas of rotation
Unbalanced torque
Applied torque - friction torque
How a sun is made. 1
Nebular cloud of interstellar gas and dust
2
Particles and dust move closer: form central core
3
Gas cloud spins at an accelerating rate
4
Conservation of angular momentum L=Iw
5
Increasing of collisions between hydrogen nuclei in core
6
Temperature of core increases. Core becomes hot, visible and radiant
