Which property of matter allows it to have a gravitational field and feel an attractive force from other matter? P. S. If anybody has done the assessment this is from through connexus and can help me with the answers to the other questions ill give you brainliest

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,?