QUIZ 7, CH.5 ----50,  52,  60, 110, 114, 118.
50.
(a)

(b)
52.
(a)


(b)

No.
60.
(a)

(b)
110.



114.
ISOLATE EACH MASS  and write down Newton's equations  for the hanging mass that's in static equilibrium and for the accelerating  mass moving in a circle

For rotating  mass we have sum of forces in the R dir (pos toward center) =  mv2/r = pos - neg = T - 0 = T.

For the hanging mass,
Sum of forces in the y dir = 0 = pos - neg = T - Mg. Thus, T = Mg and   mv2/r = Mg.
Solve for v to get:
118.
(a)

(b)