The figure shows a pendulum of length l = 2.8 m. its bob (which effectively has all the mass) has speed v0 when the cord makes an angle θ0 = 45° with the vertical. (a) what is the speed of the bob when it is in its lowest position if v0 = 6.0 m/s? what is the least value that v0 can have if the pendulum is to swing down and then up (b) to a horizontal position, and (c) to a vertical position with the cord remaining straight? (d) do the answers to (b) and (c) increase, decrease, or remain the same if θ0 is increased by a few degrees? (a) number enter your answer in accordance to item (a) of the question statement units choose the answer from the menu in accordance to item (a) of the question statement (b) number enter your answer in accordance to item (b) of the question statement units choose the answer from the menu in accordance to item (b) of the question statement (c) number enter your answer in accordance to item (c) of the question statement units choose the answer from the menu in accordance to item (c) of the question statement (d) choose the answer from the menu in accordance to item (d) of the question statement

could u help me w/ this

Explanation:

You are out and about in the country and your father sees a rock that he really wants in the yard. Now you must get the very heavy rock into the back of a truck. The truck bed is 3 feet off the ground. Your father pulls out a 5-foot plank and begins to set up a ramp. At the same time, you (who know about mechanical advantage!) have found a plank that is 8 feet long, and you show it to your father.

Which plank will give you the most mechanical advantage? Calculate the MA for each plank.

lil timmy this one is hard but the answer is b

Explanation:

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.