Coefficient of sliding friction without an Fa

Click For Summary
To determine the force needed to accelerate a 65kg crate up a 25-degree incline at 7 m/s² with a coefficient of sliding friction of 0.2, it's essential to analyze the forces acting on the crate. The gravitational force must be resolved into components parallel and perpendicular to the incline, requiring the use of trigonometric functions. The frictional force can be calculated using the normal force, which is influenced by the incline angle and the weight of the crate. A free body diagram (FBD) is recommended to visualize these forces and facilitate the calculations. Understanding these dynamics is crucial for solving the problem effectively.
!!!!!!!
Messages
8
Reaction score
0
Problem: A 65kg create is to be accelerated at 7 m/s/s up an incline making an angle of 25 degrees with the horizontal. If the coefficient of sliding friction is .2, what force is needed to accomplish this motion?

Well I've tried manipulating this equation to give me either a Ff or an Fn for the mu=Ff/Fn equation. Problem is where its on an incline, i need Facos25 and Fasin25, but i don't have an Fa, all I am given is a 7m/s/s. I am a bit stuck and need some help here
Thanks in advance
 
Physics news on Phys.org
this is a tough one, anybody?
 
draw a FBD and then break it down into all the forces acting on it
 
Thread 'Chain falling out of a horizontal tube onto a table'

Thread 'Chain falling out of a horizontal tube onto a table'

My attempt: Initial total M.E = PE of hanging part + PE of part of chain in the tube. I've considered the table as to be at zero of PE. PE of hanging part = ##\frac{1}{2} \frac{m}{l}gh^{2}##. PE of part in the tube = ##\frac{m}{l}(l - h)gh##. Final ME = ##\frac{1}{2}\frac{m}{l}gh^{2}## + ##\frac{1}{2}\frac{m}{l}hv^{2}##. Since Initial ME = Final ME. Therefore, ##\frac{1}{2}\frac{m}{l}hv^{2}## = ##\frac{m}{l}(l-h)gh##. Solving this gives: ## v = \sqrt{2g(l-h)}##. But the answer in the book...
View full post »

Similar threads

Yes! Calculating Friction Coefficient
  • · Replies 1 ·
Replies
1
Views
1K
Coefficient of Friction when Normal Force is Reduced [HS]
  • · Replies 5 ·
Replies
5
Views
2K
Mechanical Physics: Coefficient of Friction
  • · Replies 20 ·
Replies
20
Views
3K
Dynamics Skier on a Slope Problem
  • · Replies 9 ·
Replies
9
Views
5K
Applying Newtons Laws: Incline, static friction, kid on sled
  • · Replies 8 ·
Replies
8
Views
2K
Is it possible to pull a wagon without wheels?
  • · Replies 10 ·
Replies
10
Views
2K
Coefficient of Friction question for a cart going down a wooden ramp
  • · Replies 18 ·
Replies
18
Views
3K
How to find Coefficient of Friction w/ Fa and mass?
  • · Replies 5 ·
Replies
5
Views
4K
How to find coefficient of friction of a body sliding down the slope?
  • · Replies 7 ·
Replies
7
Views
2K
Finding Radial Force from Free Body Diagram
  • · Replies 4 ·
Replies
4
Views
2K