Solving MA: Sum of Forces = Mass x Acceleration

Thread starter Oblivion77
Start date Dec 14, 2008
Tags

Forces Sum Sum of forces

AI Thread Summary

To solve for the acceleration of body A using the equation Sum of Forces = Mass x Acceleration, focus on analyzing the forces acting specifically on body A. The first part of the problem has been solved, yielding a mass of 10kg. For part B, it is crucial to correctly identify which free body diagram (FBD) to draw to accurately assess the forces on body A. Properly identifying the forces will lead to the correct calculation of acceleration. Understanding the relationship between mass, forces, and acceleration is key to solving the problem effectively.

Dec 14, 2008

Oblivion77

Homework Statement

Homework Equations

Sum of forces = MA

The Attempt at a Solution

I already found the answer to part A, which is 10kg. But for part B I am not sure which box to draw my FBD on.

Physics news on Phys.org

Dec 14, 2008

Doc Al

Mentor

Oblivion77 said:

But for part B I am not sure which box to draw my FBD on.

Since you want the acceleration of body A, analyze the forces on body A.

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'

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 »

Thread 'Explain this asphalt sheen'

This problem is two parts. The first is to determine what effects are being provided by each of the elements - 1) the window panes; 2) the asphalt surface. My answer to that is The second part of the problem is exactly why you get this affect. And one more spoiler:

View full post »