Equilibrant & box and plank problems

  • Thread starter Thread starter ariol
  • Start date Start date
  • Tags Tags
    Box
AI Thread Summary
The discussion revolves around solving multiple physics problems related to forces and motion. Problem 3 requires calculating the equilibrant force for a ring subjected to two given forces, emphasizing the need to show all calculations. Problem 4 focuses on determining the parallel and perpendicular components of weight for a box on an inclined plank. Problem 5 involves calculating the frictional force acting on the same box as it slides down the incline, given a coefficient of kinetic friction. Lastly, Problem 6 asks for the box's acceleration while sliding down, and Problem 7 requests a free-body diagram to illustrate the forces acting on the box. The participants express difficulty in solving these problems independently and seek guidance.
ariol
Messages
7
Reaction score
0
Problem 3:
Two forces are exerted on a ring. The first force is a force of 20 N, 30 degrees North of East, and the second force is 15 N, 10 degrees West of North. What is the magnitude and direction of the equilibrant that keeps the ring from moving? Show all work.

Problem 4:
A 75-kg plastic box full of baseballs is resting on a long plank. If Ben raises one end of the plank up off the floor so it makes a 40 degree incline, what are the parallel and perpendicular weight components of the box with respect to the plank? Show all work.

Problem 5:

The same box in the previous problem starts to slide down the incline, if the coefficient of the kinetic friction is 0.32 what is the frictional force exerted on the box by the plank as it slides down the incline? Show all work.

Problem 6:
As Janelle distracts Ben, he ignores the box in problem 4 continue to slide down the plank at the same angle, what is the boxes acceleration as it heads towards the floor? Show all work.

Problem 7: Draw a free-body diagram of the forces acting on the box of baseballs as it slides down the plank in the previous problem (Draw vectors of appropriate length and label all the different forces.)
 
Physics news on Phys.org
Where do you get stuck?
 
These problems are way too difficult for us to do all by ourselves, ariol.
Please, SHOW US YOUR WORK!
 
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