1 shin
4), -0.6/6
Question 4. [25 points]
F2.0 N
F - 2.0 N
F-2.4N
A. In each case at right, a ball bearing that is
spinning freely in a counterclockwise direction is
subjected to a stream of air that acts to slow the
0,= 0.4 /s
01. - 0.518
bearing down. Due to the air stream, each bearing
will eventually stop rotating counterclockwise
F = 1.8N
F = 2.5N
F=2AN
and start rotating clockwise. The angular speed of
each bearing when the stream is first applied, and
the force that each stream of air exerts on the
0= 0.518
0, 0.4 Is
bearing are given in each figure. All of the
bearings are identical, and the nozzle directing the air stream is in the same position in each case. Assume the force due to the
air stream acts on the rim of the bearing.
i. Rank these situations on the basis of the magnitude of the angular acceleration of the bearings at an instant while the
bearings are slowing down. Explain your reasoning.
0,
0.6/s
ii. Suppose the radius of the bearing is 0.08 meters and the mass of the bearings is 0.4 kg,
(a) Determine the time it would take for the bearing in situation A to come to rest. Show all work.
Angular velocity
Angular acceleration
Net Torque
(b) Consider the entire motion of the
bearing in situation A (rotating
counter clockwise and slowing down,
coming to rest for an instant, and then
rotating clockwise and speeding up.
Sketch graphs for the angular
velocity, the angular acceleration, and
the net Torque, as a function of time
for the entire motion. The time at
which the bearing switches direction
is indicated in each graph with a hatch mark.

elly's long hair:

a. if the salon only takes cash, then this isn't the problem. it doesn't matter how much she has in her checking account.   she can't get a haircut until she has the cash.

b. if she has overdraft protection, then there's no problem.   she can go ahead and write a check that her account can't cover, then sometime later, pay the bank some outrageous usury for loaning her a few bucks for a few days, but with beautiful hair.

c. if elly has some principles, and doesn't want to write a bad check, then now she has a problem.   her desire for the new hairstyle is in conflict with her honesty and integrity.

d.   if the bank will not process a check she writes, then even if she had a million $$ in her account, she couldn't use any of it.   the amount she has in her account is not the problem.   and if i may suggest, she might as well close her checking account, and put the money where it'll work for her.   it's not doing her a bit of good in a checking account, since she can't write any checks.

justin can't pay the full balance:

a. he can't even handle the credit limit he has now.   under no circumstances should he ask for a higher limit.

b.   he can ask for the grace period to be extended.   but that's no solution, the bank will almost certainly refuse anyway, and there are much better options.   he knew the rules of his credit card when he started using it.

c.   he definitely should pay the interest on the balance, plus as much of the balance as he can cover at the same time.

d.   he definitely should pay the minimum otherwise they could shut down his card.   he should also pay as much more as he possibly can.   he should also remember the awkward situation he's in, stop buying stuff on credit that he can't afford, and avoid adding any more debt.

i'd say that justin's best best option isn't on this list of choices.   what he has to do:   pay as much as he can at least the minimum payment plus as much more as he can and then avoid adding more debt.

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.

prndulum needs thread, weight clock to time swings