Recent content by Rionic

Force input= 8.5 and force output=73?

A bicycle wheel has a diameter of 73cm and is driven by a chain on a gear of 8.5cm diameter What is the ideal mechanical advantage? I know that IMA=de/dr But I'm not sure which one is de and which one is dr.

Ohh so it's a=Ft/m - g?

Doesn't the m on the right side cancel? And maybe this question doesn't require a direction because it doesn't tell me if it's going upwards or downwards

Fnet=Ft-Fg then I turned fnet into ma and Fg into mg so it looked like Ma=Ft-mg then rearranged it to a=Ft-g by dividing m on both sides

I drew an FBD with Fg downwards and Ft upwards

If there is a 70N tension in a rope attached to a 4.0 kg bucket, what will be the vertical acceleration of the bucket? I'm not really sure how to do this. I can find tension but not acceleration. I think I'm missing something simple. I'm also confused about the direction because it doesn't...