C 2 Π r Radius m Circumference m v d T Distance m Speed msec Period sec 2 Π r Review Whenever an object accelerates there must be a NET FORCE ID: 656354
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Slide1
Circular motionSlide2
Angular velocity
C = 2
Π
r
Radius (m)
Circumference
(m)
v =
d T
Distance (m)
Speed
(m/sec)
Period
(sec)
2
Π
rSlide3
Review
Whenever an object accelerates there must be a….
NET FORCESlide4
Centripetal force
The force that accelerates an object inwards (towards the center of the circle ) Slide5
Examples of Fc
A Mass is twirled in a circle at the end of a string, the Fc is provided by ________________________
When a car rounds a corner on a highway, the centripetal force is provided by
_________________________When the moon orbits the Earth, the Fc is provided by __________________________Slide6
Examples of Fc
A Mass is twirled in a circle at the end of a string, the Fc is provided by
Tension
When a car rounds a corner on a highway, the centripetal force is provided by FrictionWhen the moon orbits the Earth, the Fc is provided by Gravity Slide7
Newtons 2
nd
law
F = MAAnd we know ac = V2 rSooooo …..Slide8Slide9
Centripetal
Force
F
c = mv
2 r
Linear speed
(m/sec)
Radius of path
(m)
Centripetal
force (N)
Mass (kg)Slide10Slide11
8.2 Calculate centripetal force
A 50-kilogram passenger on an amusement park ride stands with his back against the wall of a cylindrical room with radius of 3 m.
What is the centripetal force of the wall pressing into his back when the room spins and he is moving at 6 m/sec?Slide12