Wood block sliding on 25 degree angle

AI Thread Summary
To determine the coefficient of kinetic friction for a wooden block sliding down a 25-degree inclined plane at a constant velocity of 6 m/s, it's essential to draw a Free Body Force diagram and establish a coordinate system aligned with the incline. The forces acting on the block include gravitational force, normal force, and friction. Since the block moves at a constant velocity, the net force along the incline is zero, indicating that the force of friction equals the component of gravitational force acting down the slope. By calculating these forces, one can derive the coefficient of kinetic friction. This approach effectively simplifies the problem and leads to the solution.
Gashouse
Messages
10
Reaction score
0
A wooden block slides directly down an inclined plane, at a constant velocity of 6 m/s. How large is the coefficient of kinetic friction, if the plane makes an angle of 25 degrees with the horizontal?
 
Physics news on Phys.org
What have you done? show some work.
 
f=UN = 6(0.4) not sure how to begin with this problem and how to find the coefficient
 
First of all, what you should do in every problem of this type, is to choose an appropriate set of axis and draw the Free Body Force diagram.
In the inclined plane questions, it is easier to solve a problem if you choose the co-ordinate axis (ie, x&y axis) as along the plane and perpendicular to the plane.
Next, identify all the forces acting on the block and find the components of each force along the axis.
Since the body is not accelerating, what is the sum of the forces acting along the plane? Can you find the value of friction from this?
 

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 »
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

Physics Homework -- block pressed against a wall is sliding....
Replies
4
Views
3K
Finding the work done by a block
Replies
4
Views
3K
Physics homework help needed -- A mass sliding down a ramp with friction
Replies
14
Views
3K
Virtual displacement for a block sliding down a wedge
Replies
3
Views
2K
What is the displacement of a 3.0 kg block sliding down an inclined plane?
Replies
12
Views
2K
Is the Block Moving Horizontally or Perpendicularly on the Inclined Plane?
Replies
3
Views
2K
Force pulling on a string at an angle with a block at the other end
Replies
2
Views
1K
Sliding blocks and a string problem
Replies
1
Views
3K
A problem about Work and Energy :(
Replies
1
Views
1K
Question Concerning The Coefficient of Friction: Block on a Rough Inclined Plane
Replies
5
Views
2K

Hot Threads

Recent Insights

Back
Top