Sliding vs Rolling: Homework Analysis

  • Thread starter Thread starter gigglin_horse
  • Start date Start date
  • Tags Tags
    Rolling Sliding
AI Thread Summary
In the discussion about the sliding versus rolling motion of a can on a slippery slope, it is established that a sliding can reaches the bottom faster than a rolling can. This is due to the conversion of gravitational potential energy into translational kinetic energy, with rolling motion also involving rotational kinetic energy, which reduces the translational speed. The participants clarify that while both scenarios convert gravitational energy, the presence of rolling energy in the rolling can results in slower overall descent. The slope dimensions mentioned, 4cm high and 1.5 meters long, provide context but do not alter the fundamental physics involved. Ultimately, sliding is more efficient in this scenario, leading to a quicker arrival at the bottom.
gigglin_horse
Messages
32
Reaction score
0

Homework Statement


"Suppose the sloping surface was very slippery so no rolling occurs (the can slides). Would the can reach the bottom sooner or later compared with the rolling motion? Explain the difference"



I don't know if its relevant, but the slope was 4cm at the high end, and 1.5 meter long.
 
Physics news on Phys.org
What do you think?
 
I read somewhere that rolling has less translational KE, and that sliding makes it to the bottom first...
This makes me even more confused
 
ya your right.

basicly gravitational energy is converted into translational KE and rolling energy (for the rolling one)
so
mgh=\frac{1}{2}mv^2+\frac{1}{2}I \omega^2

what are you confused about?
 
Ohhhh ok.
Thats brilliant, thanks for your help
 

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

How can we model a rolling truck on an incline using rotational motion analysis?
Replies
24
Views
2K
Rolling cylinder or slipping cylinder reaches bottom first?
Replies
5
Views
4K
A child rolls a marble....Plot graphs etc.
Replies
4
Views
5K
Solve Unwinding Yo-Yo Homework: No Slipping Allowed
Replies
49
Views
9K
Effect of density on downward rolling spheres
Replies
14
Views
4K
Which Object Will Roll Farther: Solid Cylinder or Hoop on an Incline?
Replies
2
Views
2K
Calculating Distance Traveled by Cart with Sliding Block
Replies
9
Views
3K
Mechanics of a ball sliding and rolling
Replies
1
Views
3K
Sphere Rolling vs. Sliding Down a Ramp
Replies
4
Views
8K
Rolling vs. Sliding: Which Ball Reaches Bottom Faster?
Replies
1
Views
14K

Hot Threads

Recent Insights

Back
Top