Acceleration on a ramp with coefficient of friction

AI Thread Summary
The discussion focuses on calculating the acceleration of a 25kg block sliding down a 30-degree ramp with a coefficient of friction of 0.3, resulting in an acceleration of 2.4 m/s². Participants emphasize the importance of using a free body diagram to analyze the forces acting on the block, including the normal force and friction. The force of friction is calculated by multiplying the coefficient of friction by the normal force. One user initially struggles with applying the coefficient of friction but ultimately resolves the issue. The conversation highlights the relevance of proper force analysis in physics problems involving inclined planes.
reganw
Messages
19
Reaction score
0
What is the acceleration of a 25kg block sliding down a ramp at 30 degrees to the horizontal, if the coefficient of friction is 0.3?

ans= 2.4m/s2


I haven't done this in a while.. I can't remember how to apply the coefficient of friction..

Thank you!

PLEASE DISREGARD.. I've figured it out now
 
Last edited:
Physics news on Phys.org
Did you make a free body diagram? Choose your axes along the incline and perpendicular to it. The forced perpendicular must balance.

The force of friction = the coefficient of friction times the normal force.
 
Berko said:
Did you make a free body diagram? Choose your axes along the incline and perpendicular to it. The forced perpendicular must balance.

The force of friction = the coefficient of friction times the normal force.

I did make the free body diagram.. but I get to the end and find the acceleration and still haven't applied the coefficient of friction because I haven't used the equation for Force of friction..
 
Nevermind, I've figured it out now.. thank you
 
Last edited:

Thread 'Errors and significant figures'

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...
View full post »
Thread 'A cylinder connected to a hanging mass'

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...
View full post »

Similar threads

Finding the work done by a block
Replies
4
Views
3K
Newton's law problem: Pushing 2 stacked blocks on a horizontal table
Replies
13
Views
3K
A ball climbing a ramp while "rolling the wrong way"
Replies
32
Views
3K
Does coefficient of kinetic friction depend on speed?
Replies
16
Views
5K
What Is the Coefficient of Kinetic Friction Between the Ramp and the Crate?
Replies
6
Views
2K
Direction of a rope with a ball inside an accelerating box
Replies
5
Views
1K
Projectile Motion with Pulley System
Replies
3
Views
2K
What Is the Coefficient of Kinetic Friction for a Block on an Inclined Plane?
Replies
18
Views
3K
Friction Problem of a Crate Sliding Down a Ramp
Replies
4
Views
3K
Having a hard time learning Newton's 2nd law
Replies
5
Views
2K

Hot Threads

Recent Insights

Back
Top