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Physics Chapter 6 Flashcards | StudBud
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Physics Chapter 6
Physics Chapter 6
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A #physics kahoo to review #BJU Physics chapter 6 over #dynamics and #newton's laws of motion
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Answers
1
mechanical force
torsion
contact force
tensile force
shear force
2
Σ
F
= 0 ↔
a
= 0
Newton's second law
Newton's third law
Newton's first law
3
concurrent forces
are equal
act through the same point
are the equilibrants of the other concurrent forces
are perpendicular within the system's reference frame
4
force that acts with one or more other forces to produce mechanical equilibrium
resultant
weight
equilibrant force
concurrent force
5
force of 10 N gives acceleration of 4 m/s2, what is the mass of the object?
40. g
2.5 g
2.5 kg
40 kg
6
reason Greek philospher's gave more credit to reason than to experimentation
hot air naturally sought the heavens
moving objects tended to slow over time
material world was corrupt; reason was naturally perfect
heavy objects sought to fall to the center of the earth.
7
SI unit of force
newton
slug
gram
kilogram
8
mathematical statement representing balanced forces
ΣFy = 0
ΣF = 0
ΣFx = 0
ΣF = ma
9
acceleration is directly proportional to the Σ sub F and in the same direction as the resultant
Newton's third law
Newton's second law
Newton's first law
10
F=16 N -> acceleration of 4 m/s2, what is the force needed for acceleration of 8 m/s2?
64 N
8 N
32 N
4 N
11
when all external forces are balanced
uniform acceleration
velocity is constant
velocity increases
system stops
12
identify the force: water against a sandbag wall
friction
shear
tension
compression
13
establishes that no acceleration takes place unless there is an unbalanced force
Newton's first law
Newton's third law
Newton's second law
14
acceleration =
resultant force / mass
resultant force /weight
individual force / mass
individual force / weight
15
F
X→Y
= -
F
Y→X
Newton's first law
Newton's third law
Newton's second law
16
a measure of the force of gravity acting on an object's mass at the earth's surface
friction
weight
force
mass
17
unequal forces on an object that cause the object to accelerate
unbalanced forces
contact force
equilibrant force
electromagnetic force
18
a force caused by the repulsion of the atoms of one object for the atoms of touched object
action-reaction pair
weight
friction
force
19
part of the universe isolated for study
system
force
friction
weight
20
phenomena Newton's laws don't hold for
extremely large particles
extremely small particles
very slow particlse
very fast particles
21
Σ
F
=
m
a
Newton's second law
Newton's third law
Newton's first law
22
number of fundamental forces related to each other
none
4
3
2
23
without unbalanced forces, moving objects
accelerate
stop
move in straight lines
travel in circular paths
24
identify the force: pinching fingers together
shear
torsion
tension
compression
25
inductively suggested the idea of inertia
Aristotle
Tycho Brahe
Galileo
Isaac Newton
26
the contact force that opposes motion between 2 surfaces
friction
equilibrant force
mass
weight
27
mass of a 4000 N horse
40 kg
400 kg
408 kg
41 kg
28
SI unit of mass
gram
Newton
pound
kilogram
29
manifested in torces exerted between atoms; 1 of 4 fundamental forces
contact force
unbalanced forces
equilibrant force
electromagnetic force
30
identify the force: air resistance
friction
compression
tension
shear
31
Greeks categorized motion into
natural / unnatural
earthly / heavenly
living / nonliving
physical / spiritual
32
example of a system in mechanical equilibrium
clock pendulum swinging
car moving at 25 mph straight down the street
bike turning a corner
space craft falling back into the earth's atmosphere
33
weight
always an equilibrant force
an intrinsic property of an object
equivilant to mass
a force
34
a force that yields a zero force sum when added to one or more concurrent forces
electromagnetic force
equilibrant force
contact force
unbalanced forces
35
condition that exists when the vector sum of all forces and torques on a system is zero
friction
mechanical equilibrium
unbalanced forces
equilibrant force
36
force of gravity acting on a mass
tension
friction
compression
weight
37
identify the force: plates rotating when light strike them
electromagnetic force
weak nuclear force
strong nuclear force
gravitational force
38
properties of force according to Newton's 3rd law
forces occur in pairs
if the resultant force is 0, acceleration is 0
the action-reaction pair act on different systems
each action-reaction pair has the same magnitude
39
force of system X on system Y is opposite the force of system Y on system X
Newton's second law
Newton's third law
Newton's first law
40
mechanical force
compression
tension
gravity
shear
41
example of a system on which unbalanced forces act
picture hanging on a wall
child sliding on a twisty slide
car moving at 25 mph straight down the street
plane flying at its assigned altitude
42
a push or a pull on a system
action-reaction pair
friction
force
weight
43
the two equal but opposite forces that exist when two systems act on each other
friction
unbalanced forces
contact force
action-reaction pair
