How Do You Incorporate Drag Force in Free Body Diagrams for Multiple Objects?

AI Thread Summary
To incorporate drag force in free body diagrams for multiple objects, it is essential to start by drawing a separate free body diagram for each object, in this case, the ducks. Assign unknown forces consistently between the objects, particularly focusing on the drag force exerted by duck 3 on the first two ducks. After establishing the diagrams, apply Newton's second law (F=ma) to each duck, ensuring that all forces, including drag, are accounted for in the equations. This method allows for a systematic approach to analyze the interactions and forces at play. Understanding these steps is crucial for accurately modeling the dynamics of the system.
MeesaWorldWide
Messages
9
Reaction score
1
Homework Statement
Three toy ducks on wheels are attached to the same rope and a boy begins pulling one end of the rope with a force of 10 N. The first duck (duck 1) has a mass of 1.0 kg, the middle duck (duck 2) has a mass of 5.0 kg, and the third duck in line (duck 3) has a mass of 2.0 kg. I already calculated the acceleration of the three ducks in part a of this question (1.25 m/s^2). The next thing is to find the tension force in the rope connecting ducks 1 and 2. I don't understand how to go about doing this: any help is appreciated!
Relevant Equations
F = ma
I don't even know how to begin this. I know that I need to somehow account for the drag force that duck 3 is causing on the first 2, but I don't know how to deal with that. I am asking for someone to help me get started, not to give me the answer.
 
Physics news on Phys.org
There can be shortcuts, but the standard procedure is to draw a free body diagram for each duck and assign unknowns to the forces between them in a consistent manner.
Then write the F=ma equation for each duck.
 
Reply
  • Like
Likes MatinSAR and PeroK

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

Why are moments not included in free body diagrams?
Replies
31
Views
2K
Potential Mistake in Free-Body Diagram
Replies
5
Views
2K
Finding Radial Force from Free Body Diagram
Replies
4
Views
2K
Block on top of an inclined plane, with a rough surface, that moves with constant acceleration
Replies
41
Views
3K
Free body Diagram of a Plank resting on two Cylinders
Replies
14
Views
3K
Solving Free-Body Diagrams for Moving Nuts on Rods: Tips and Techniques
Replies
9
Views
2K
Understanding Free Body Diagrams: Explaining the Forces on a Compressed Board
Replies
7
Views
2K
Drag Force Acting on an Object with Respect to Velocity
Replies
31
Views
3K
Free body diagram on a block pushed against a ceiling
Replies
7
Views
3K
Center of mass and momentum- A question about systems
Replies
25
Views
1K

Hot Threads

Recent Insights

Back
Top