Flashcards
Circular Motion
Cards in this deck (29)
- 1Angular DisplacementThe change in angle of an object moving in a circular path
- 2SI UnitsDegrees
- 3What is the angular displacement in one complete circle1 complete revolution= 360 degrees = 2π rad
- 4One RadianAngle subtended at the centre of the circle by an arc length equal to the radius of the circle
- 5Relationship b/w S and ϴS=rϴ
- 6Angular VelocityThe rate of change of angular displacement w.r.t time
- 7Formula 1w = ϴ / t
- 8SI Unitsrad / s
- 9FrequencyNumber of revolutions per second
- 10Relationship b/w angular velocity and frequencyw= ϴ / t
ϴ= 2π
t= T
w= 2π/T
w= 2πf - 11Relationship b/w linear velocity and angular velocityv=rw
- 12Direction of linear velocityTangent to the circle at any point
- 13AccelerationRate of change of velocity with respect to time
- 14Explain the change in velocity even if it's moving with constant speedvelocity is a vector quantity.
magnitude and direction are equally important
direction changes continuously
magnitude is constant - 15Direction of accelerationTowards the centre of the circle
- 16Formula for Acceleration 1a= vw
- 17Formula 2a= rw²
- 18Formula 3a= v²/r
- 19Is an object moving in circular path in equilibrium?Direction changes, so does velocity.
Hence object is accelerating.
Hence there must be an external unbalanced force.
Hence object is not in equilibrium. - 20Identify unbalanced forceCentripetal force
- 21Centripetal ForceForce that keeps an object moving in a circular path
- 22Direction of Centripetal ForceTowards the centre of the circle, along the direction of acceleration
- 23Direction of force is in the same direction as motion of the objectCauses an acceleration in the sense that speed of the object changes as in magnitude of the velocity changes
- 24Direction of force is perpendicular to the direction of motionCauses an acceleration in the sense that the direction of velocity changes ( speed does not change)
Object moves in circular path - 25In conical pendulum, what causes centripetal forceTsinϴ= Fc
Tsinϴ= mv²/r - 26In the example of a car moving around a curve, what causes FcFriction
- 27In turning of an aircraft in air, what is FcLsinϴ
L= lift force - 28What is Fc in Earth orbiting the Sun?GMm/ r²
- 29Fc in charged particle moving perpendicularly in a magnetic fieldBqv
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- Flashcards on Circular Motion , created by Fatima Saleem on 06/12/2016.
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- Fatima Saleem
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