The surplus energy theory of play suggests that
a. children are the link between animals and human beings
b. children have too much energy and play will rid them of that energy.
c. play is necessary to reenergize human cognition.
d. play provides children with an opportunity to practice adult activities

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,?