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