Ok, how should I go about this one?

  • Thread starter Thread starter matt85
  • Start date Start date
AI Thread Summary
To determine the net charge on a 12.00g plastic ball suspended in a uniform electric field of 10^3 N/C at a 30° angle with the vertical, one must analyze the forces acting on the ball. The ball is in equilibrium, indicating that the net force is zero, meaning the electric force and gravitational force are balanced. By identifying the forces and setting up equations for both the x and y components, one can solve for the charge using Coulomb's Law. The equilibrium condition allows for the calculation of the charge based on the known values of the electric field and the weight of the ball. This approach leads to the determination of the net charge on the ball.
matt85
Messages
25
Reaction score
0
Pendulum

A small 12.00g plastic ball is suspended by a string in a uniform, horizontal electric field with a magnitude of 10^3 N/C. If the ball is in equilibrium when the string makes a 30 ° angle with the vertical, what is the net charge on the ball?

Q = _________ C

I know Coloumb's Law, and I assume I want to implement it here somehow, however I don't know where to begin on setting this one up.
 
Physics news on Phys.org
Oh, and here is the visual.
 

Attachments

  • pic.gif
    pic.gif
    3.6 KB · Views: 635
The ball is in equilibrium. What does that tell you?
 
That there is no force acting on it?
 
No, that isn't exactly the definition of equilibrium.

Equilibrium is when there is no _net_ force acting on it.
 
matt85 said:
That there is no force acting on it?
That there's no net force acting on it. Or, in other words: The net force is zero.

Start by identifying all the forces acting on the ball, then set up the equations for equilibrium. (Analyze the x and y components separately.)
 
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »
Thread 'A cylinder connected to a hanged mass'

Thread 'A cylinder connected to a hanged 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

How Do You Calculate the Electric Charge on a Suspended Cork Ball?
Replies
2
Views
2K
Finding Charge & Tension of a Suspended Cork Ball
Replies
3
Views
4K
Capacitors, equipotentials, and electric fields
Replies
5
Views
884
Finding the tension in the thread
Replies
7
Views
2K
Tangential Acceleration Problem, UCM
Replies
2
Views
1K
Foucault Pendulum at the North Pole
Replies
9
Views
2K
To what extent does this system behave as a pendulum?
Replies
1
Views
841
Magnitude of charge on parallel plates
Replies
20
Views
3K
Seemingly a related rates problem
Replies
11
Views
2K
Finding Angle of String with Two Charged Balls
Replies
1
Views
2K

Hot Threads

Recent Insights

Back
Top