URGENT HELP PLEASE - Rock on Strings?

https://tycho-s.phys.washington.edu/cgi/...





A 540 gm rock is whirled on the end of a string 45 cm long which will break under a tension of 32 N.


a) What is the highest speed the rock can reach before the string breaks? (Neglect gravity.)





vmax = m/s





HELP: Draw a FBD of rock on string.


b) If two other strings identical to the first were attached to the rock, how fast could the rock be whirled before the three strings would break?





v'max = m/s


Next the rock is held by two of the same 45 cm strings with ends 63 cm apart and whirled in a circle between them. Neglect gravity.





c) What is the radius of the circle of motion?





R = cm


d) Now what is the maximum speed the rock can have before the string breaks?





v''max = m/s

URGENT HELP PLEASE - Rock on Strings?
isnt this your homework??
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