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Physics
Circular Motion & Gravitation
11th
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28 Terms
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1
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Uniform Circular Motion
Constant Speed in a Circular Path
2
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Is circular motion a form of accelerated motion?
yes
3
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What causes acceleration
force
4
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How do you change an object’s direction without changing its speed?
Use a force that acts perpendicularly to the direction of its velocity
5
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To make an object move with uniform circular motion, the net force must always be directed toward the ___
center of the circle (inward)
6
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Centripetal Force
Any force that acts inward
7
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\+velocity
\+inward force
8
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\+mass
\+Inward force
9
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\+ radius
* inward force
10
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FC=
mv^2/r
11
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AC=
v^2/r
12
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Period (T)
time it takes to complete one revolution
Units: s
r = 1/f
13
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Frequency (f)
the number of revolutions made per unit of time
Units: rev/s
f = 1/r
14
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Object’s linear speed (v) =
v = 2pir/T or v = 2pirf
15
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FT =
mv^2/r
16
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\#g’s =
FN/FW or v^2/r/g
17
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v(using g’s) =
root(#g\**r**g)
18
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FC required =
FSMAX =
mv^2/r
umg
19
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What effect does a vehicle’s mass have on its ability to turn?
No effect
20
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radius +
max speed +
21
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u +
max speed +
22
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speed +
min radius +
23
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u +
min radius -
24
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radius +
u -
25
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velocity +
u +
26
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As an object spins faster
horizontal component of tension +
vertical component always mg
angle +
27
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Tsintheta =
Tcostheta =
tantheta =
mv^2/r
mg
v^2/rg or Fx/Fy
28
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v (banked turn) =
root(rgtantheta)
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