Centripital force - did i do it correctly?

[klm]

yay! thank you so much!

 

[klm]

oh no , am i doing something wrong.

don't the m's cancel out on both sides. so you get g=V^2 / r
so 9.8= v^2 / 9.5
so v = 9.65

 

[Doc Al]

Good! Now use that to find the the corresponding period.

(The mass canceling just means that the answer does not depend on the mass.)

 

[klm]

i'm sorry i don't know how to do that? isn't a period just 2xpixr or am i thinking of the wrong thing

 

[Doc Al]

The period is the time it takes to go around one complete spin. You have the speed; the distance is one circumference.

 

[klm]

i'm sorry i still do not understand. so i need to multiply the speed (9.65) by the distance (2PiR) ?

 

[Doc Al]

You should know this: Distance = speed X time.

 

[klm]

ooh i see what you are saying. I'm sorry i should have realized that.