COLLEGE PHYSICS FREEDMAN CHAPTER 28
COMPLETE COURSE REVIEW GUIDE
◉ which objects produce a restoring force.
Answer: spring, steel beam, rubber band, leg bone
◉ the spring force is.
Answer: in the opposite direction as the change in the spring's
length
◉ what factors contribute to improving the stability of an object.
Answer: wider base and lower center of gravity
◉ an object can remain balanced if.
Answer: its center of gravity is over the pivot point
◉ the spring force is larger.
Answer: the more the spring is stretched or compressed
◉ in order for an object to be in static equilibrium.
Answer: both the net force and the net torque equal zero
,◉ for an object in static equilibrium.
Answer: the net torque about any point is zero
◉ for a particular spring, the spring constant.
Answer: is the same regardless of stretching or compressing
◉ impulse can be defined as.
Answer: change of momentum
◉ The change of momentum of a system.
Answer: is zero for an isolated system, equal to the net 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 to.
Answer: Ignore small forces during a collision
◉ In a collision, one way to decrease the force of impact is to.
Answer: increase the time of the impact
◉ The direction of the momentum vector is.
, Answer: the same as the velocity
◉ The forces on 2 objects during a collision.
Answer: are in opposite directions
◉ The momentum of an object is.
Answer: mass * velocity
◉ Using the average force of an interaction is useful because.
Answer: the time dependence of the force can be complicated
◉ the impulse of an interaction can be defined as.
Answer: Favg * Δt
◉ the total momentum of a system is conserved if.
Answer: there are no external forces acting on the system
◉ conservation of angular momentum explains.
Answer: lizards twisting in mid-air, the quick movements of a flying
bat, and the high wind speeds near the eye of a hurricane
◉ In two-dimensional collisions momentum conservation is.
COMPLETE COURSE REVIEW GUIDE
◉ which objects produce a restoring force.
Answer: spring, steel beam, rubber band, leg bone
◉ the spring force is.
Answer: in the opposite direction as the change in the spring's
length
◉ what factors contribute to improving the stability of an object.
Answer: wider base and lower center of gravity
◉ an object can remain balanced if.
Answer: its center of gravity is over the pivot point
◉ the spring force is larger.
Answer: the more the spring is stretched or compressed
◉ in order for an object to be in static equilibrium.
Answer: both the net force and the net torque equal zero
,◉ for an object in static equilibrium.
Answer: the net torque about any point is zero
◉ for a particular spring, the spring constant.
Answer: is the same regardless of stretching or compressing
◉ impulse can be defined as.
Answer: change of momentum
◉ The change of momentum of a system.
Answer: is zero for an isolated system, equal to the net 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 to.
Answer: Ignore small forces during a collision
◉ In a collision, one way to decrease the force of impact is to.
Answer: increase the time of the impact
◉ The direction of the momentum vector is.
, Answer: the same as the velocity
◉ The forces on 2 objects during a collision.
Answer: are in opposite directions
◉ The momentum of an object is.
Answer: mass * velocity
◉ Using the average force of an interaction is useful because.
Answer: the time dependence of the force can be complicated
◉ the impulse of an interaction can be defined as.
Answer: Favg * Δt
◉ the total momentum of a system is conserved if.
Answer: there are no external forces acting on the system
◉ conservation of angular momentum explains.
Answer: lizards twisting in mid-air, the quick movements of a flying
bat, and the high wind speeds near the eye of a hurricane
◉ In two-dimensional collisions momentum conservation is.
