Recent content by Robeurer

So the equation for the torque will be $$TR-f_fR-f_wR=I\alpha$$ $$T-f_f-f_w = \frac{1}{2}Ma$$ From there we can obtain two equations $$f_f=T-f_w-\frac{1}{2}Ma$$ $$f_w=T-f_f-\frac{1}{2}Ma$$ Inputting f_f to the equations of x plane, we obtain $$N_w = \frac{4T-Ma}{3}$$ Inputting f_w to the...

If the cylinder's acceleration is 0, then the equation for both forces on x and y plane should be like this $$T+f_f-N_w = 0$$ $$f_w+N_f-mg=0$$ And also we know that ##a=r\alpha##, so the radial acceleration also become zero? if so, then $$TR-f_fR-f_wR =0$$ $$T-f_f-f_w = 0 $$

After re-read the question, the rope is wound around it.

I'm not sure either, but maybe it's wound around the cylinder.

How come the cylinder is not accelerating? I thought that it will also accelerate just like the falling mass like in the Atwood's machine. If the cylinder is not accelerating, all we need to do to find the acceleration of the falling mass is by finding the value of ##T##. Is it correct?

@Steve4Physics @ibrkic0 I'm really really sorry that it looks like there's a mistake. The question asks about the acceleration of the falling mass and does not mention anything about the system's acceleration. Sorry.

@Steve4Physics @ibrkic0 Looks like there's a typo. The mass of the hanging object is 11 kg

What I mean by system's acceleration is the acceleration for both the falling mass and for the cylinder. I stated that the force on the hanging mass is ##mg - T = ma## and ##T+f_f-N_w=ma##. The "a" on the right side of the equations is the one that we are looking about.

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to...

I don't really understand how the friction provides tangential acceleration but, if it said that the object moving with tangential acceleration, is the object tangential acceleration is the same with the on you mentioned?

Let's say we have an object moving in a circular path with radius R and rough surface. We want to know the maximum distance covered by the car before it slip. Should we use the resultant of both the tangential acceleration and the radial acceleration or just one of them to put in the...

When you hold a screwdriver with your hand, a pressure is exerted on it. Does the pressure you exert determine the magnitude of torque in rotating the screwdriver?