Homework Statement
Homework Equations
KVL
The Attempt at a Solution
Using KVL around BE loop
0-0.6-i_e*(30*10^3)-15=0
i_e=-0.52mA
However, I stuck when I tried to find i_c and use KVL around CE loop/ CB loop
For CE loop:
10-i_c*(15*10^3)-Vce-i_e*(30*10^3)-15=0
For CB loop...
Homework Statement
Two masses have same mass m, both of them are tied by a string and put in a hollow cylinder.
When the cylinder start to rotate until the angular speed is ω.
The tension in the string is T and the string breaks, both masses move away from the axis in the hollow cylinder...
Homework Statement
Homework Equations
v=rω
conservation of energy
The Attempt at a Solution
I don't know whether it is correct or not, and I am quite confused in part b
it asks the angular speed of the pulley
can I say that v=rω since the pulley and box A,B have a common velocity?
so is ω...
Thank you for all of you help!
It seems like I can get the correct solution now:kiss:
mg-T=ma
a=rα
1.25T=Iα
just solve the above equations and I can get α=2.65 rad s^-2:biggrin:
Homework Statement
https://holland.pk/uptow/i4/ae8d3da6c3ce3cad10eb98dd3208a955.png
Homework Equations
τ=I⋅α
The Attempt at a Solution
I want to discuss in part (a) of the question
Tension in 5 kg block string=mg=5*9.8=49N
Taking moment at the pivot, a net torque acting on 15 kg post is...