I'm in need of help on my physics

  • Thread starter Thread starter cmwestbr
  • Start date Start date
  • Tags Tags
    Physics
AI Thread Summary
The discussion focuses on solving gravitational force problems involving three particles and two spheres. Participants emphasize using the gravitational force formula F = G*m1*m2/r^2 for calculating forces between the masses. It is noted that the three particles interact as pairs, requiring careful consideration of distances and directions. A participant suggests starting with basic principles and being cautious with sign notation when calculating forces. The conversation highlights the need for clarity in applying gravitational concepts to the given scenarios.
cmwestbr
Messages
6
Reaction score
0
Could anyone help me with these problems? It's on Gravitational Force

The drawing shows three particles far away from any other objects and located on a straight line. The masses of these particles are mA = 363 kg, mB = 517 kg, and mC = 154 kg. Find the magnitude and direction of the net gravitational force acting on each of the three particles (let the direction to the right be positive).
particle A N
particle B N
particle C N


A bowling ball (mass = 7.2 kg, radius = 0.10 m) and a billiard ball (mass = 0.32 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other?
 
Physics news on Phys.org
cmwestbr said:
Could anyone help me with these problems? It's on Gravitational Force

The drawing shows three particles far away from any other objects and located on a straight line. The masses of these particles are mA = 363 kg, mB = 517 kg, and mC = 154 kg. Find the magnitude and direction of the net gravitational force acting on each of the three particles (let the direction to the right be positive).
particle A N
particle B N
particle C N


A bowling ball (mass = 7.2 kg, radius = 0.10 m) and a billiard ball (mass = 0.32 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other?
The fact that the 3 masses are far away from any other object imples that only the 3 masses are interacting with each other via the gravitational force. You can treat them as uniform spheres, which means that they are point particles located at the sphere's center with mass M. So, what is the equation that you are going to use ?

marlon
 
Start from the basic and use this for a system of two particles separated by distance r.

use... G*m1*m2/r^2

Now see that 3 particles can create 3 pairs.Be careful with the distance between a and c and the sign notation when moving from c to a and from b to a.
 
so what ima do is...6.67*10^-11(363kg)(517kg)/9.8^2...or is that not right?
 

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

Equilibrium of Forces and Torques on Sawhorses Supporting a Person on a Board
Replies
6
Views
2K
-- The drawing shows three particles far away from....
Replies
7
Views
4K
Find the attractive force of gravity between two objects
Replies
8
Views
2K
What is the maximum gravitational force between two uniform spheres?
Replies
3
Views
9K
Magnitude of the maximum gravitational force
Replies
3
Views
7K
Calculating Net Gravitational Force in Equilateral Triangle Configuration
Replies
5
Views
2K
Angular Acceleration of Cord Problem
Replies
10
Views
3K
Finding Tension force in a SHM Pendulum
Replies
4
Views
2K
Determine the direction and acceleration of the bead
Replies
6
Views
4K
The force LRO experiences due to moons gravity?
Replies
3
Views
2K

Hot Threads

Recent Insights

Back
Top