AH 1.2 Angular Motion Flashcards
Explain what is meant by angular displacement (angle) by drawing a diagram and stating an equation.
Define all symbols used and specify units.
State, in words, what is meant by angular velocity
Angular velocity is the rate of change of angular displacement.
Write down the equation for angular velocity of a particle P describing uniform circular motion specifying all symbols and naming units.
Anglular velocity unit: radians per second
Angular displacemnt unit: radians
Time unit: seconds
Write down the equation for instantaneous angular velocity.
Write down the equation for instantaneous angular acceleration in terms of
anglular velocity and
angular displacement.
Copy and complete the table to show the angular versions of the linear equations of motion.
Derive the equation given below for the linear (tangential) velocity of a body describing uniform circular motion.
Derive the equation for the tangential linear acceleration of a body describing non-uniform circular motion.
What condition must always be met for a body to describe iniform circular motion?
The body must be subjecy to a centrally directed i.e. centripetal force.
Is a centripetal force always balanced or unbalanced?
Centripetal force always unbalanced.
How is it possible for a body describing uniform circular motion to be accelerating whilst maintaining a constant linear speed?
Velocity is a vector quantity. Although the magnitude of the (linear) velocity is uniform, it’s direction is contstantly changing, as the object concerned is moving in a circle.
Derive the equations for centripetal (i.e radial) acceleration given below.
Study the information below then write down two equations for centripetal force. These follow directly from the equations for centripetal acceleration.