sportsfan

1) A wheel with a radius of 0.7m and a moment of inertia 8kg m2 has an initial rotational velocity of 7 rad/s. A person takes a block and presses it against the edge of wheel, slowing it down with friction. The coefficient of kinetic friction between the wheel and the block is 0.4 and the person presses with a force that increases as a function of time: (8t) N.

How long does it take for the wheel to stop?

How far did the wheel rotate in the time it took to stop?

2) A block of mass 9kg is moving in a circular path on a tabletop. The radius of the circle is 0.5m and the object's speed is 4m/s.

What is the initial angular momentum of the system? kg m^2/s

What is the initial kinetic energy of the system? J

Suppose the mass was being pulled in circular motion by a string. The string is threaded through a small hole on the top of the table, and a person pulls on the string until it has a length of 0.4m.

What is the new angular momentum of the system? kg m^2/s

What is the new speed of the mass? m/s

What is the new kinetic energy of the system? J

Comparing kinetic energies, how much work was done? J

On paper, find the work done on the object by integrating the work done as the mass is pulled inwards. The force in question will be the tension in the string, which is known by calculating the centripetal force as a function of string length. Note that velocity is a function of string length

Hello, so I need names of poems that are inspirational and still humorous. Please give me some suggestions. PLEASE REPLY ASAP. THANKS A LOT

http://games.espn.go.com/nba/tradeMachine?tradeId=...

Is Mlb 2k9 for wii a good game and

after the season mode is over

does the game continue on with a draft???

Do you believe that the SF giants are going to represent the national league, and win, if yes y?

if no how will they end the season??

predict the warriors record for this season, and how they end the season

ex. losing in the finals, in the 1st round?????

For some reason my windows movie maker doesn't play any audio for some reason, and i have downloaded it from Limewire.com

Can i have some advice to make music work on windows movie maker

Thanks

If a baseball game gets rained out, do the fans who purchased the tickets for that day, do they get the same seats, and free admission to the makeup game?

Who are the 10 worst players in this years playoffs that are starting?

Denver Nuggets or Chicago Bulls

NBA Basketball or NCAA Basketball, and why??

Now that the 9ers have drafted Nate Davis, who would win the starting QB job, and why?

Who do you think the 49ers would draft in the 1st round and why??

Is nba live 2009 for wii a good game, rate it out of ten and why you chose the number you did? Also is there a nba draft in nba live 2009, after the season is over?

Is it possible to delete an yahoo account?

For some reason I don't have chat on my in box. Does anyone know what I can do to get chat onto my yahoo mail without downloading anything?

I am trying to grow a tusli plant in my backyard (in California). My plant dies every year. How do you prevent a tulsi plant from dieing?

I have a Pomeranian, and I want to train him off leash training, so he won't run away, also how do I stop him from barking without using a bark collar.

Do you think the 49ers will make the playoffs next year? And if so how far do you think they will go?

why or why not?