centripetal acceleration

[megha]

hey evr1.....i have been trying to do this quest....but somehow cant get it....any help is really appreciated..thnx

a child swings a yoyo of weight mg in a horizontal circle such tht the cord makes an angle of 30 with the vertical. find the centripetal acceleration of the yoyo. (g=10m/s/s)?

it wuld be gr8 if sum1 showd the steps to this problem

[daniel_i_l]

Since the yoyo is in constant motion (no acceleration), then the horizontal part of the ropes tension (T*sin(angle)) equals the centripetal force. with the force you can find the acceleration (2 law). You also know that the vertical part of the tension (T*cos(angle)) equals the downward force of gravity (mg). Use that to find the tension, and use the tension to find the centripetal force and acceleration.

[megha]

hey..thnx a lot....u saved ma life..thnx