Electrical Force Homework: Double Charge, Double Distance, 2x Force

  • Thread starter Thread starter VLC
  • Start date Start date
  • Tags Tags
    Electrical Force
AI Thread Summary
When the charge of one particle is doubled and the distance between the two particles is also doubled, the resulting force can be calculated using Coulomb's law. The formula F = k(q1*q2)/r^2 shows that doubling one charge increases the force by a factor of two. However, doubling the distance decreases the force by a factor of four. Therefore, the new force is F = (2q1*q2)/(2r)^2, simplifying to F = (2q1*q2)/4r^2, which equals F/2. The final answer indicates that the force will be halved, resulting in F/2.
VLC
Messages
1
Reaction score
0

Homework Statement


Two charged particles repel each other with a force of F. if the charge of one of the particles is doubled and the distance between them is also doubled, then the force will be?


Homework Equations





The Attempt at a Solution

Answer = 2F
 
Physics news on Phys.org
F=kq1q2/r^2

I replace q1 with 2q1 and r with 2r. F=?
 
Thread 'Variable mass system : water sprayed into a moving container'
Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
I was thinking using 2 purple mattress samples, and taping them together, I do want other ideas though, the main guidelines are; Must have a volume LESS than 1600 cubic centimeters, and CAN'T exceed 25 cm in ANY direction. Must be LESS than 1 kg. NO parachutes. NO glue or Tape can touch the egg. MUST be able to take egg out in less than 1 minute. Grade A large eggs will be used.
Back
Top