Tension / Kinetic Friction Help

AI Thread Summary
The discussion focuses on calculating the coefficient of kinetic friction for a toboggan sliding down an 8-degree incline at constant velocity. The significance of constant velocity is highlighted, indicating that the forces acting on the toboggan are balanced, resulting in zero net force and no acceleration. The gravitational force component parallel to the incline equals the friction force opposing it. Participants are encouraged to refer to Hyperphysics for a deeper understanding of the concepts involved. Understanding these principles is essential for solving the problem effectively.
shimshi_o4
Messages
2
Reaction score
0
Tension / Kinetic Friction Help!

Please help me.. i can't figure out how to solve this problems..

* A taboggan slides down a hill and has a constant velocity. The angle of the hill is 8.00 degrees with respect to the horizontal. What is the coefficient of kinetic friction between the surface of the hill and the taboggan?
 
Physics news on Phys.org


i don't really know how to solve this problem.. I am sorry, i don't know its significance..
 


shimshi_o4 said:
i don't really know how to solve this problem.. I am sorry, i don't know its significance..
When a force is applied to a mass, the mass accelerates.

When forces are balanced, e.g. if the force of gravity is balanced equally by the friction force, the net force is zero, which means that there is no acceleration, so the mass moves at 'constant velocity'. So on the incline the component of the force of gravity parallel to the surface of the incline is equal to the friction force, which is acting in the opposite direction.

Please refer to the Hyperphysics reference and the application of Newton's law to a mass on an incline.
 
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...
Thread 'Collision of a bullet on a rod-string system: query'
In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
Thread 'A cylinder connected to a hanging mass'
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...
Back
Top