 #1
 66
 5
Homework Statement
A system, consisting of a wide rope of mass 0.10 kg between two blocks each of mass 0.10 kg, is lifted by an applied force F = 9.0 N (Fig. 4 below). (a) Find the acceleration of the system. Find the tension at (b) the top of the rope, and (c) the bottom of onefifth of the rope. Take g = 10 m/s2.
Homework Equations
Fnet=ma
The Attempt at a Solution
a) Fnet=ma
F 3mg = ma
9 3(0.1)(10) = 0.1a
6=0.1 a
a= 60 m/s^2
b) T 2mg = ma
T2(0.10)(10) = 0.10(60) (it's right to use the mass of rope by acceleration right?)
T2=66
Ttop= 68N
is it right?
c) T (4/5x m) 10xm= (4/5)m x a
T 0.08(10)  (0.10)(10)= 0.08(60) is this equation right
i don't if i got (the bottom of onefifth of the rope) correctly or not. i considered the tension to equal to that part of the rope below 1/5 from the mass so that m of rope now is 4/5m
and also i have the lower mass (m). so is it right??
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