How do find the volume of a prizm

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?

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,?