Test Bank for University Physics for Life Sciences 1st
Edition Randall-stamped
What is displacement? - ANSWER It quantifies both the distance and direction of
an imaginary motion along a straight line from the initial position to the final position
of the point.
What is velocity? - ANSWER Speed in a given direction
What is acceleration? - ANSWER The rate at which velocity changes
Newton's First Law of Motion - ANSWER when all of the forces add up to zero
(they balance each other out) then
the body does not accelerate.
Newton's Second Law of Motion - ANSWER When you add up (by the rules of
vectors) all of the forces acting on a body you get the same thing as when you
multiply the mass m of the body by the acceleration of the body.
Draw Free-body diagrams - ANSWER
Newton's Third Law of Motion - ANSWER Forces come into (and go out of)
existence in pairs. The two forces of the pair are equal in size,
opposite in direction, and act on different bodies.
The Tension Force - ANSWER stretching of a rope. It is constant everywhere
along a rope and always pulls in the direction along the rope.
The Ideal Spring - ANSWER it has no weight, mass, or damping losses. The
force exerted by the spring is proportional to the distance the spring is stretched or
compressed from its relaxed position.
weight - ANSWER A measure of the force of gravity on an object
normal force - ANSWER the force perpendicular to a surface that prevents an
object from falling through the surface
friction - ANSWER A force that opposes motion between two surfaces that are in
contact
tension - ANSWER stress that occurs when forces act to stretch an object
elastic force - ANSWER force exerted by a material when it is stretched or
compressed
centripetal force - ANSWER a force that acts on a body moving in a circular path
and is directed toward the center around which the body is moving.
, centripetal acceleration - ANSWER acceleration of an object toward the center of
a curved or circular path
uniform circular motion - ANSWER the movement of an object at a constant
speed around a circle with a fixed radius
convert between radians, degrees and revolutions - ANSWER 1rad × 180/π =
degrees
1rad ÷ 2π = revolutions
angular speed - ANSWER the rate at which an object rotates or revolves
angular acceleration - ANSWER The rate of change of angular velocity
work - ANSWER A result of a force moving an object a certain distance. = Fd
power - ANSWER the rate at which work is done
work-energy theorem - ANSWER The work done on an object equals the change
in kinetic energy of the object
gravitational potential energy - ANSWER potential energy related to an object's
height
elastic potential energy - ANSWER the energy of stretched or compressed
objects
conservation of energy principle - ANSWER Energy can be transferred usefully,
stored or dissipated, but it can never be destroyed or created
Equilibrium - ANSWER A body that is in equilibrium is neither accelerating along
a line nor is its rotation getting faster or
slower.
torque - ANSWER a turning or twisting force
centre of mass - ANSWER A point through which any externally applied force
produces straight-line motion but no rotation
State the two equilibrium conditions - ANSWER 1. the vector sum of forces on the
body must be zero and 2. the vector sum of torques on the body must be zero.
stress - ANSWER the force per unit area applied to the material.
strain - ANSWER relative change in shape or size
elastic modulus - ANSWER ratio of stress to strain
explain the difference between tensile/compressive, shear, and bulk strain -
ANSWER
Edition Randall-stamped
What is displacement? - ANSWER It quantifies both the distance and direction of
an imaginary motion along a straight line from the initial position to the final position
of the point.
What is velocity? - ANSWER Speed in a given direction
What is acceleration? - ANSWER The rate at which velocity changes
Newton's First Law of Motion - ANSWER when all of the forces add up to zero
(they balance each other out) then
the body does not accelerate.
Newton's Second Law of Motion - ANSWER When you add up (by the rules of
vectors) all of the forces acting on a body you get the same thing as when you
multiply the mass m of the body by the acceleration of the body.
Draw Free-body diagrams - ANSWER
Newton's Third Law of Motion - ANSWER Forces come into (and go out of)
existence in pairs. The two forces of the pair are equal in size,
opposite in direction, and act on different bodies.
The Tension Force - ANSWER stretching of a rope. It is constant everywhere
along a rope and always pulls in the direction along the rope.
The Ideal Spring - ANSWER it has no weight, mass, or damping losses. The
force exerted by the spring is proportional to the distance the spring is stretched or
compressed from its relaxed position.
weight - ANSWER A measure of the force of gravity on an object
normal force - ANSWER the force perpendicular to a surface that prevents an
object from falling through the surface
friction - ANSWER A force that opposes motion between two surfaces that are in
contact
tension - ANSWER stress that occurs when forces act to stretch an object
elastic force - ANSWER force exerted by a material when it is stretched or
compressed
centripetal force - ANSWER a force that acts on a body moving in a circular path
and is directed toward the center around which the body is moving.
, centripetal acceleration - ANSWER acceleration of an object toward the center of
a curved or circular path
uniform circular motion - ANSWER the movement of an object at a constant
speed around a circle with a fixed radius
convert between radians, degrees and revolutions - ANSWER 1rad × 180/π =
degrees
1rad ÷ 2π = revolutions
angular speed - ANSWER the rate at which an object rotates or revolves
angular acceleration - ANSWER The rate of change of angular velocity
work - ANSWER A result of a force moving an object a certain distance. = Fd
power - ANSWER the rate at which work is done
work-energy theorem - ANSWER The work done on an object equals the change
in kinetic energy of the object
gravitational potential energy - ANSWER potential energy related to an object's
height
elastic potential energy - ANSWER the energy of stretched or compressed
objects
conservation of energy principle - ANSWER Energy can be transferred usefully,
stored or dissipated, but it can never be destroyed or created
Equilibrium - ANSWER A body that is in equilibrium is neither accelerating along
a line nor is its rotation getting faster or
slower.
torque - ANSWER a turning or twisting force
centre of mass - ANSWER A point through which any externally applied force
produces straight-line motion but no rotation
State the two equilibrium conditions - ANSWER 1. the vector sum of forces on the
body must be zero and 2. the vector sum of torques on the body must be zero.
stress - ANSWER the force per unit area applied to the material.
strain - ANSWER relative change in shape or size
elastic modulus - ANSWER ratio of stress to strain
explain the difference between tensile/compressive, shear, and bulk strain -
ANSWER
