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Frictional Force Homework: Answer B
- Thread starter chawki
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- Force Frictional force
AI Thread Summary
The discussion revolves around calculating the frictional force using the coefficient of static friction. The calculation presented shows that the frictional force (Ff) is determined by multiplying the coefficient of static friction (0.30) by the weight of the crate (mass times gravity), resulting in approximately 249.9N. Clarification is sought regarding the movement of the crate, confirming that it will not move until the applied horizontal force exceeds the static friction force. The conversation highlights confusion about the distinction between static and kinetic friction. Overall, the key takeaway is the understanding of when an object will begin to move based on the forces acting upon it.
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19.
For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
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 which, cylinder or the hanging mass, they're working on.
Force on the hanging mass
$$mg - T = ma$$
Force(Cylinder) on y
$$N_f + f_w - Mg = 0$$
Force(Cylinder) on x
$$T + f_f - N_w = Ma$$
There's also...
This problem is two parts. The first is to determine what effects are being provided by each of the elements - 1) the window panes; 2) the asphalt surface. My answer to that is
The second part of the problem is exactly why you get this affect.
And one more spoiler:
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