問題一覧
1
the algebraic sum of all the components of the forces along the x and the y components must be ZERO.
balance of forces
2
the forces that act upon an object are balanced, then the object is said to be in a state of
equilibrium
3
Equilibrium is the state of a body at rest or in uniform motion, the resultant of all forces on which is
zero
4
-The second condition of static equilibrium says that the net torque acting on the object must be
zero
5
we can say that the sum of the clockwise torques around an axis is - to the sum of the counterclockwise torques around the same axis.
equal
6
defined as a rotational or twisting effect of a force;
torque
7
measure of
the force that can cause an object to rotate about an axis; its SI unit is newton-
meter(Nm), or the unit foot-pound (ft-lb)
torque
8
means equal balance or it is a state of balance.
equilibrium
9
an object is in - when the vector sum of all the forces acting on it is zero.
translational equilibrium
10
says that the net torque acting on the object is zero
rotational equilibrium
11
ability of an object to rotate at an axis
torque
12
defined as "the angle in radians (degrees, revolutions) through which a point or line has been rotated about a specified axis". It is the angle of the movement of a body in a circular path.
angular displacement
13
is equal to the ratio of the arc length(s) and the radius(r), as shown in the figure.
angular displacement
14
is the rate at which an object rotates, or revolves, about an axis, or at which the angular displacement between two bodies changes.
angular velocity
15
the time rate of change of the angular velocity and
is designated by a and expressed in radians per second squared. In equation,
angular acceleration
16
is motion in a circle at constant speed.
uniform circular motion
17
the distance traveled by an object along a circular path.
arc length
18
unit of angle measurement.
radian
19
The work done on a system by a constant force is the product of the component of the force in the direction of motion times the distance through which the force acts.
work
20
the transfer of energy by a force acting on an object as it is displaced.
work
21
if the displacement is either zero or perpendicular to the force.
work done is zero
22
if the force and displacement have the same direction, and negative if they have opposite direction.
work done is positive
23
ability to do work
energy
24
the energy an object has by reason of its motion,
ke
25
the energy an object has by reason of its position,
gravitational potential energy
26
states that the net work, Wet on a system changes its kinetic energy, meaning, when there is a net force doing work on an object, the object's kinetic energy will change by an amount equal to the work done,
work-energy theorem
27
states that energy can not be created or destroyed, it can merely be changed from one form of energy to another. Energy often ends up as heat, which is thermal energy of atoms and molecules.
law of conservation of energy
28
the rate at which work is done,
power
29
J/s
W
30
Ihp
746 W
31
application of a force over a distance.
work
32
defined as the capacity for doing work.
energy
33
is the energy in motion while potential energy is the energy at rest.
ke
34
neither be created nor destroyed, but only transformed from one kind to another.
energy
35
the time rate of doing work.
power
36
if you want to change the momentum of an object, you have to apply a
force
37
effect of the force and the time the force is applied, is the - of the force
impulse
38
quantity that describes an object's resistance to stopping (a kind of "moving inertia)
momentum
39
momentum symbol
p
40
is a quantity that describes the effect of a net force acting on an object a kind of "moving force").
impulse
41
is the product of an object's mass and velocity, in equation:
momentum
42
impulse is represented by symbol
J
43
the product of the average net force acting on an object and its duration,
impulse
44
states that the change in momentum of an object equals the impulse applied to it,
impulse-momentum theorem
45
logically equivalent to Newton's second law of motion.
impulse-momentum theorem
46
sudden, forceful coming together in direct contact of two bodies,
collision
47
mechanical energy is conserved; that is, the total kinetic energy of the system of particles after collision equals the total kinetic energy before collision, in equation,
elastic collision
48
the total kinetic energy after collision is different from the initial total kinetic energy.
inelastic collision
49
indicates how elastic or inelastic the collision is. equal to zero indicates a perfectly inelastic collision, in which the colliding bodies stick together after the collision.
coefficient of restitution
50
product of mass and its velocity.
momentum
51
product of force and the time over which it acts on an object.
impulse
52
causes a change in the momentum of an object.
impulse
53
the momentum or kinetic energy is transferred from one object to another.
collision
54
Property of a body to return to its original size and shape when the forces that deformed it are removed, such as on plastics, foams, rubbers, metals, etc.
elasticity
55
force or combination of forces distributed throughout the whole of an object that acts to deform it
stress
56
is a measure of how much an object is stretched or deformed
strain
57
are substances that continually deforms (flows) under an applied shear stress, or external force
fluids
58
essentially the study of fluids either in motion or at rest
fluid mechanics
59
the ratio of normal force to area.
pressure
60
way to describe force in a region of a continuous system
pressure
61
the pressure that is exerted by a fluid at equilibrium at a given point within the fluid, due to the force of gravity. It increases in proportion to depth measured from the surface because of the increasing weight of fluid exerting downward force from above
hydrostatic pressure
62
“When the pressure on any part of a confined fluid (liquid or gas) is changed, the pressure on every other part of the fluid is also changed by the same amount.”
pascal's principle
63
also known as the buoyant force
bouyance
64
is the force exerted on an object that is wholly or partly immersed in a fluid.
buoyancy
65
caused by differences in pressure acting on opposite sides of an
object immersed in a static fluid.
buoyancy
66
defined informally as the quantity that describes a fluid's resistance to flow.
viscosity
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100問 • 1年前問題一覧
1
the algebraic sum of all the components of the forces along the x and the y components must be ZERO.
balance of forces
2
the forces that act upon an object are balanced, then the object is said to be in a state of
equilibrium
3
Equilibrium is the state of a body at rest or in uniform motion, the resultant of all forces on which is
zero
4
-The second condition of static equilibrium says that the net torque acting on the object must be
zero
5
we can say that the sum of the clockwise torques around an axis is - to the sum of the counterclockwise torques around the same axis.
equal
6
defined as a rotational or twisting effect of a force;
torque
7
measure of
the force that can cause an object to rotate about an axis; its SI unit is newton-
meter(Nm), or the unit foot-pound (ft-lb)
torque
8
means equal balance or it is a state of balance.
equilibrium
9
an object is in - when the vector sum of all the forces acting on it is zero.
translational equilibrium
10
says that the net torque acting on the object is zero
rotational equilibrium
11
ability of an object to rotate at an axis
torque
12
defined as "the angle in radians (degrees, revolutions) through which a point or line has been rotated about a specified axis". It is the angle of the movement of a body in a circular path.
angular displacement
13
is equal to the ratio of the arc length(s) and the radius(r), as shown in the figure.
angular displacement
14
is the rate at which an object rotates, or revolves, about an axis, or at which the angular displacement between two bodies changes.
angular velocity
15
the time rate of change of the angular velocity and
is designated by a and expressed in radians per second squared. In equation,
angular acceleration
16
is motion in a circle at constant speed.
uniform circular motion
17
the distance traveled by an object along a circular path.
arc length
18
unit of angle measurement.
radian
19
The work done on a system by a constant force is the product of the component of the force in the direction of motion times the distance through which the force acts.
work
20
the transfer of energy by a force acting on an object as it is displaced.
work
21
if the displacement is either zero or perpendicular to the force.
work done is zero
22
if the force and displacement have the same direction, and negative if they have opposite direction.
work done is positive
23
ability to do work
energy
24
the energy an object has by reason of its motion,
ke
25
the energy an object has by reason of its position,
gravitational potential energy
26
states that the net work, Wet on a system changes its kinetic energy, meaning, when there is a net force doing work on an object, the object's kinetic energy will change by an amount equal to the work done,
work-energy theorem
27
states that energy can not be created or destroyed, it can merely be changed from one form of energy to another. Energy often ends up as heat, which is thermal energy of atoms and molecules.
law of conservation of energy
28
the rate at which work is done,
power
29
J/s
W
30
Ihp
746 W
31
application of a force over a distance.
work
32
defined as the capacity for doing work.
energy
33
is the energy in motion while potential energy is the energy at rest.
ke
34
neither be created nor destroyed, but only transformed from one kind to another.
energy
35
the time rate of doing work.
power
36
if you want to change the momentum of an object, you have to apply a
force
37
effect of the force and the time the force is applied, is the - of the force
impulse
38
quantity that describes an object's resistance to stopping (a kind of "moving inertia)
momentum
39
momentum symbol
p
40
is a quantity that describes the effect of a net force acting on an object a kind of "moving force").
impulse
41
is the product of an object's mass and velocity, in equation:
momentum
42
impulse is represented by symbol
J
43
the product of the average net force acting on an object and its duration,
impulse
44
states that the change in momentum of an object equals the impulse applied to it,
impulse-momentum theorem
45
logically equivalent to Newton's second law of motion.
impulse-momentum theorem
46
sudden, forceful coming together in direct contact of two bodies,
collision
47
mechanical energy is conserved; that is, the total kinetic energy of the system of particles after collision equals the total kinetic energy before collision, in equation,
elastic collision
48
the total kinetic energy after collision is different from the initial total kinetic energy.
inelastic collision
49
indicates how elastic or inelastic the collision is. equal to zero indicates a perfectly inelastic collision, in which the colliding bodies stick together after the collision.
coefficient of restitution
50
product of mass and its velocity.
momentum
51
product of force and the time over which it acts on an object.
impulse
52
causes a change in the momentum of an object.
impulse
53
the momentum or kinetic energy is transferred from one object to another.
collision
54
Property of a body to return to its original size and shape when the forces that deformed it are removed, such as on plastics, foams, rubbers, metals, etc.
elasticity
55
force or combination of forces distributed throughout the whole of an object that acts to deform it
stress
56
is a measure of how much an object is stretched or deformed
strain
57
are substances that continually deforms (flows) under an applied shear stress, or external force
fluids
58
essentially the study of fluids either in motion or at rest
fluid mechanics
59
the ratio of normal force to area.
pressure
60
way to describe force in a region of a continuous system
pressure
61
the pressure that is exerted by a fluid at equilibrium at a given point within the fluid, due to the force of gravity. It increases in proportion to depth measured from the surface because of the increasing weight of fluid exerting downward force from above
hydrostatic pressure
62
“When the pressure on any part of a confined fluid (liquid or gas) is changed, the pressure on every other part of the fluid is also changed by the same amount.”
pascal's principle
63
also known as the buoyant force
bouyance
64
is the force exerted on an object that is wholly or partly immersed in a fluid.
buoyancy
65
caused by differences in pressure acting on opposite sides of an
object immersed in a static fluid.
buoyancy
66
defined informally as the quantity that describes a fluid's resistance to flow.
viscosity