What is Hydroelectric energy used for? Use in your own words.

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

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,?