How Fast Does a Block Slide Down a Ramp with Friction?

  • Thread starter Thread starter vic05
  • Start date Start date
  • Tags Tags
    Sliding Velocity
AI Thread Summary
To determine the speed of a block sliding down a 1-meter ramp at a 30-degree angle with a coefficient of kinetic friction of 0.4, the normal force must be calculated first. The normal force is influenced by the gravitational force and the mass of the block. The kinetic friction force is derived from the coefficient of friction multiplied by the normal force. A formula provided by the professor for acceleration is a = g[sin(θ) - μk*cos(θ)], emphasizing the importance of understanding the derivation of formulas rather than rote memorization. This approach highlights the fundamental principles of physics in solving problems involving friction and motion.
vic05
Messages
2
Reaction score
0

Homework Statement


Block slides down a 1 meter ramp at a 30 degree angle. The coefficient of kinetic friction is 0.4
what is the block's speed at the bottom of the ramp?


Homework Equations



kineticFriction force = coefficient of friction X normal Force

normal Force = force of gravity + mass*acceleration

The Attempt at a Solution



I've tried the problem but i get stuck of finding the normal force required to find the kinetic friction force. Can someone guide me a little bit please... thank you in advanced
 
Physics news on Phys.org
The normal force and the component of the weight of the block need to cancel each other out.
 
solved! the professor gave us a formula but I copied it wrong... just for reference the formula which gave acceleration was a = g[sinO - UkcosO]
 
Physics not about memorizing formulas, it is about deriving them from first principles, so can you?
 

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 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Thread 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Figure 1 Overall Structure Diagram Figure 2: Top view of the piston when it is cylindrical A circular opening is created at a height of 5 meters above the water surface. Inside this opening is a sleeve-type piston with a cross-sectional area of 1 square meter. The piston is pulled to the right at a constant speed. The pulling force is（Figure 2）： F = ρshg = 1000 × 1 × 5 × 10 = 50,000 N. Figure 3: Modifying the structure to incorporate a fixed internal piston When I modify the piston...
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
Analyzing acceleration of block on a ramp connected to a pulley
Replies
15
Views
2K
Why is the direction of kinetic/static friction up a ramp?
Replies
7
Views
1K
Coefficient of kinetic friction of a block sliding across the ceiling
Replies
7
Views
1K
Coefficient of Friction question for a cart going down a wooden ramp
Replies
18
Views
3K
Physics homework help needed -- A mass sliding down a ramp with friction
Replies
14
Views
3K
Box and a Spring on on an inclined plane
Replies
11
Views
3K
Friction Problem of a Crate Sliding Down a Ramp
Replies
4
Views
3K
Forces/Dynamics: A block sliding on a plate
Replies
45
Views
7K
Physics Homework -- block pressed against a wall is sliding....
Replies
4
Views
3K

Hot Threads

Recent Insights

Back
Top