Introduction: When Tony Hawk wants to launch himself as high as possible off the half-pipe, how does he achieve this? The skate park is an excellent example of the conservation of energy. The law of conservation of energy tells us that we can never create or destroy energy, but we can change its form. In this lab, we will look at the conversion of energy between gravitational-potential energy, work, and kinetic (or moving) energy.

Use the internet, your textbook, or notes to define the following key terms:

Kinetic Energy -

Potential Energy -

Mechanical Energy

Joule

State, in your own words, the Law of the Conversation of Energy.

Procedure: PheT Simulations à Play With Sims à Physics à Energy Skate Park: Basics

Take some time and play with the skater. Turn on the Bar Graph, Pie Chart, and Speed options.

How does increasing skater's mass change the skater’s….

Kinetic Energy? Potential Energy? Total Energy?

How does the skater’s kinetic energy change as he moves down the ramp?

How does the skater’s kinetic energy change as he moves up the ramp?

How does the skater’s potential energy change as he moves down the ramp?

How does the skater’s potential energy change as he moves up the ramp?

How does the skater’s total energy change as he moves down the ramp?

How does the skater’s total energy change as he moves up the ramp?

Describe the skater’s kinetic energy at the bottom of the ramp.

Describe the skater’s potential energy at the bottom of the ramp.

What happens when the skater is dropped onto the ramp from above the ramp?

Observe the following situations. Draw the possible bar graphs for the situation shown. Compare your results with a nearby lab group, AFTER you have completed this section.

where's the following? you gotta add it to know what the choices are

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.

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

spare some change and give it to the poor

explanation:

plz : ((