Determine the centripetal acceleration an object has when object has when traveling at a constant speed of 20m/s around a circle with radius of 2m

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?

What causes the development of most clouds and precipitation in the atmosphere?