College Physics I Exam 3UPDATED ACTUAL
Questions and CORRECT Answers
hooke's law relates the spring force to the change in the length of
the spring
which objects produce a restoring spring, steel beam, rubber band, leg bone
force
the spring force is in the opposite direction as the change in the
spring's length
what factors contribute to wider base and lower center of gravity
improving the stability of an object
an object can remain balanced if its center of gravity is over the pivot point
the spring force is larger the more the spring is stretched or compressed
in order for an object to be in static both the net force and the net torque equal zero
equilibrium
for an object in static equilibrium the net torque about any point is zero
for a particular spring, the spring is the same regardless of stretching or
constant compressing
impulse can be defined as change of momentum
The change of momentum of a is zero for an isolated system, equal to the net
system force on the system multiplied by the time
interval of the interaction, zero if the external net
force is zero
, the impulse approximation is used Ignore small forces during a collision
to
In a collision, one way to decrease increase the time of the impact
the force of impact is to
The direction of the momentum the same as the velocity
vector is
The forces on 2 objects during a are in opposite directions
collision
The momentum of an object is mass * velocity
Using the average force of an the time dependence of the force can be
interaction is useful because complicated
the impulse of an interaction can be Favg * Δt
defined as
the total momentum of a system is there are no external forces acting on the system
conserved if
conservation of angular momentum lizards twisting in mid-air, the quick movements of
explains a flying bat, and the high wind speeds near the
eye of a hurricane
In two-dimensional collisions In both the x and y directions
momentum conservation is
An example of conservation of An ice skater changing the speed of a spin
angular momentum is
Questions and CORRECT Answers
hooke's law relates the spring force to the change in the length of
the spring
which objects produce a restoring spring, steel beam, rubber band, leg bone
force
the spring force is in the opposite direction as the change in the
spring's length
what factors contribute to wider base and lower center of gravity
improving the stability of an object
an object can remain balanced if its center of gravity is over the pivot point
the spring force is larger the more the spring is stretched or compressed
in order for an object to be in static both the net force and the net torque equal zero
equilibrium
for an object in static equilibrium the net torque about any point is zero
for a particular spring, the spring is the same regardless of stretching or
constant compressing
impulse can be defined as change of momentum
The change of momentum of a is zero for an isolated system, equal to the net
system force on the system multiplied by the time
interval of the interaction, zero if the external net
force is zero
, the impulse approximation is used Ignore small forces during a collision
to
In a collision, one way to decrease increase the time of the impact
the force of impact is to
The direction of the momentum the same as the velocity
vector is
The forces on 2 objects during a are in opposite directions
collision
The momentum of an object is mass * velocity
Using the average force of an the time dependence of the force can be
interaction is useful because complicated
the impulse of an interaction can be Favg * Δt
defined as
the total momentum of a system is there are no external forces acting on the system
conserved if
conservation of angular momentum lizards twisting in mid-air, the quick movements of
explains a flying bat, and the high wind speeds near the
eye of a hurricane
In two-dimensional collisions In both the x and y directions
momentum conservation is
An example of conservation of An ice skater changing the speed of a spin
angular momentum is
