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 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

Coefficient of kinetic friction of a block sliding across the ceiling
Replies
7
Views
1K
Does coefficient of kinetic friction depend on speed?
Replies
16
Views
5K
Inclined Plane Problem with Kinetic Friction
Replies
3
Views
2K
Coefficient of Friction question for a cart going down a wooden ramp
Replies
18
Views
3K
Friction problem of a block sandwiched between 2 surfaces
Replies
6
Views
1K
How to find the coefficient of kinetic friction
Replies
4
Views
3K
Static friction coefficient for a crate in the back of a truck
Replies
6
Views
2K
Question(s) Regarding Magnitude of Force (Window Washer Problem)
Replies
3
Views
1K
Find the Coefficient of Kinetic Friction for Crate Movement
Replies
2
Views
2K
Static and Kinetic Friction problem
Replies
9
Views
6K

Hot Threads

Recent Insights

Back
Top