Circular Motion Flashcards
Equation to convert between instantaneous and angular velocity
v = wr
Equation relating time period to angular velocity
w = 2π/T
define centripetal force
? a force towards the centre of the circle that keeps an object travelling in a circular motion.
Equation for centripetal acceleration
a =v^2/r
Equation for centripetal force
F =mv^2/r
equation to find angle in radians
𝛳 =s/r
Equation relating angular speed and force
F=mw^2r
Describe the forces acting on a roller coaster at the bottom of the curve
The weight in acting downwards, and the support force is acting upwards. resultant force = centripetal force. Thus S -W = F (resultant)
define angular displacement
Angle in which the object is moving around a circle.
Define angular speed
? angle an object moves per unit time
Can you explain why the velocity of the object changes as it is travelling uniformly in a circle
velocity is a vector quantity, thus when travelling in a circle the direction of the object constantly changes thus the velocity changes
Can you describe what happens to the force between the passenger and
his seat when travelling over a curved bridge?
Lose contact with the road, as the object muse be acted by a resultant force towards the centre of the curvature
