Monday

December 22, 2014

December 22, 2014

Posted by **Joe** on Saturday, April 19, 2008 at 11:41pm.

1. If a curve with a radius of 60m is properly banked for a car travelling at 60km/hr, what must the coefficient of static friction be for a car not to skid when travelling at 90km/hr?

2. A satellite of mass "m" moves in a circular orbit about the earth at a height "h" above its surface. If the radius of the earth is R and the accel due to gravity at the earth's surface is "g" show that the period of the satellite can be expressed as T=2pi*route((R+h)^3 / gR^2)

3. Calculate the mass of the sun using the fact that the period of the earth is 3.16x10^7 seconds and its mean distance from the sun is 1.5x10^11m. (G=6.67x10^-11 Nm^2/kg^2)

4. Conical pendulum question-

An amusement park ride consists of a rotating circular platform 8m in diameter from which seats are suspended at the end of 2.5m chains. When the system rotates the cahins holding the seats make an angle theta=28degrees with the vertical a) what is the speed of the seat? b) If a child of mass 40kg sits in the 10kg seat, what is the tension in the chain?

Thanks huge guys, if I can see how these questions are done, i should be set for my midterm exam.

- Physics 12 -
**bobpursley**, Sunday, April 20, 2008 at 10:28amI strongly recommend you obtain a copy of Schaum's Outline Series for Physics, available at any college bookstore, or at Barnes Noble. Very reasonalbly priced, and a valuable asset of solve problems.

- Physics 12 -
**Joe**, Sunday, April 20, 2008 at 11:18amMorning bump!

**Answer this Question**

**Related Questions**

Physics - Grade 12 - I've been doing extra questions for physics, but these four...

history - Ok i am having trouble with my world history homework questions...

Math - I asked this question yesterday, but I am still having alot of trouble, ...

physics bobpursly help still having trouble - A satellite in a circular orbit ...

~ MATH - The average price of gasoline lately has been hovering lately at $3.80...

math - The average price of gasoline lately has been hovering lately at $3.80. ...

Precal - Please help. I'm having a lot of trouble with solving inequalities and...

Math - Still have trouble with this question. If four dice are rolled what is ...

Physics - Please help!!! Physics test!? I have a physics test tomorrow on ...

Math - I've been having trouble with these four problems. Please help. 1)-8n(6...