What Is the Coefficient of Kinetic Friction in This Physics Problem?

AI Thread Summary
The problem involves pulling a 250N crate with a 50N force at constant velocity, leading to the calculation of the coefficient of kinetic friction. The frictional force is equated to the applied force, resulting in the equation 50N = coefficient x 250N. Dividing both sides gives a coefficient of kinetic friction of 0.2. The solution is confirmed as correct, indicating that the calculations are straightforward. Understanding this concept is essential for solving similar physics problems.
Spartan Erik
Messages
29
Reaction score
0

Homework Statement


"A forward horizontal force of 50N is used to pull a crate, which weighs 250N, at a constant velocity across a horizontal floor. The coefficient of kinetic friction is:"

Homework Equations


Frictional force = coefficient of kinetic friction x normal force

The Attempt at a Solution


This problem seems too easy, that's why I'm wondering if I might be wrong:

Frictional force = coefficient of kinetic friction x normal force
50N = coefficient x 250N
50N / 250N = coefficient
coefficient = 0.2

Is that all? Thanks
 
Physics news on Phys.org
yup that is correct.
 
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 hanged 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