Circular Motion and Forces
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Flashcards about Circular Motion, Centripetal Force and Newton's Laws
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14 Terms
Circular Motion
When an object is moving in a circular path.
Centripetal Force
A force that continuously acts on a body at 90 degrees to the instantaneous direction of motion, deviating it along a circular path.
Centripetal Acceleration
The acceleration implied by a centripetal force, mathematically expressed as a = v^2/r.
Variables in F = mv^2/r
v = linear velocity, r = radius of turn, m = mass
Inertia
The tendency of an object to resist any change in its state of motion or rest.
tanθ
sinθ/cosθ
Adjacent side to the angle
Use cos(θ)
Opposite side to the angle
Use sin(θ)
Newton’s Second Law
The force acting on an object is equal to the mass of that object multiplied by its acceleration. F=ma
R
Normal force (upward)
mg
Weight (downward)
a = v^2/r
Centripetal acceleration, always towards the centre of the circle.
Periodic Time
The time taken for 1 complete circle
Total distance refers to
The circumference of the circle
Note 
Flashcards (60)