Physics 121 Final Exam QUESTIONS AND
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Terms in this set (82)
how many standard balloons can fit about 200
into a minivan?
A standard helium balloon is of the order of a foot
across. The inside of a minivan is about 5 feet across
by 4 feet high by 8 feet long. That is a volume of
about 200 cubic feet. Probably only about 2/3 of
that can be used for balloons, so 200 is probably
too high, but it is closer than any of the other
answers.
carrying bucket at constant speed, none, it's a constant speed so no CHANGE in kinetic
what work is done? energy
also it wasn't lifted up, so the gravitational energy
didn't change since gravitational force was
perpendicular to the displacement
, unstable equilibrium point is where where the potential energy is at a maximum
neutral equilibrium is where? where it is flat no curvature
how to take a dot product? ii - jj = 1 number
net work is equal to what?? CHANGE in kinetic energy.
think about v2 in the kinetic energy theorem and
remember that !
conservative forces include: gravity conservative, electric elastic,
nonconservative forces include: air resistance nonconservative, friction applied
definition tension push and pull
conservative forces have NO NET WORK over a
closed loop, equal work between points
irrespective of path, always has potential energy
function
nonconservative forces do more work over longer
path distances and do have net work over closed
loops
point of stable equilibrium definition a point where a force will always bring it back to
that no matter what, like a ball in a bowl it will
always make it back to the bottom, or a stretchy
spring will always make it back to its resting state.
what is impulse? impulse is change in momentum
what is momentum equation? momentum is mass times velocity
CORRECTLY WELL DEFINED ANSWERS LATEST
ALREADY GRADED A+
Play your way to mastery with fun games
Match Blocks Charms NEW
Terms in this set (82)
how many standard balloons can fit about 200
into a minivan?
A standard helium balloon is of the order of a foot
across. The inside of a minivan is about 5 feet across
by 4 feet high by 8 feet long. That is a volume of
about 200 cubic feet. Probably only about 2/3 of
that can be used for balloons, so 200 is probably
too high, but it is closer than any of the other
answers.
carrying bucket at constant speed, none, it's a constant speed so no CHANGE in kinetic
what work is done? energy
also it wasn't lifted up, so the gravitational energy
didn't change since gravitational force was
perpendicular to the displacement
, unstable equilibrium point is where where the potential energy is at a maximum
neutral equilibrium is where? where it is flat no curvature
how to take a dot product? ii - jj = 1 number
net work is equal to what?? CHANGE in kinetic energy.
think about v2 in the kinetic energy theorem and
remember that !
conservative forces include: gravity conservative, electric elastic,
nonconservative forces include: air resistance nonconservative, friction applied
definition tension push and pull
conservative forces have NO NET WORK over a
closed loop, equal work between points
irrespective of path, always has potential energy
function
nonconservative forces do more work over longer
path distances and do have net work over closed
loops
point of stable equilibrium definition a point where a force will always bring it back to
that no matter what, like a ball in a bowl it will
always make it back to the bottom, or a stretchy
spring will always make it back to its resting state.
what is impulse? impulse is change in momentum
what is momentum equation? momentum is mass times velocity
