Sliding heavy crate across rough floor

  • Thread starter Thread starter tim_mannire
  • Start date Start date
  • Tags Tags
    Sliding
AI Thread Summary
To slide a heavy crate across a rough floor, key forces include gravity, friction, and the applied force from the person pushing the crate. While gravity and friction are always present, the applied force is crucial for initiating movement. Air resistance is generally negligible in this scenario. A free body diagram can help visualize these forces and clarify their roles. Understanding these dynamics is essential for determining how to effectively move the crate.
tim_mannire
Messages
14
Reaction score
0

Homework Statement



You are trying to move a heavy crate by sliding it across a rough floor. Identify the forces involved in actually getting it to move.

Homework Equations



??

The Attempt at a Solution



forces of gravity, air resistance, friction??
 
Physics news on Phys.org


Yes, all those forces are acting on the block, but which are actually involved in moving the block? That is the question. Also, you are missing one force.

HINT: What is the person pushing the block doing?

It may help to draw a free body diagram.
 
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...
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...
Back
Top