Homework Help: Physics

Posted by Anonymous on Monday, February 18, 2013 at 2:19pm.

Two particles each have a mass of 5.5 10-3 kg. One has a charge of +4.8 10-6 C, and the other has a charge of -4.8 10-6 C. They are initially held at rest at a distance of 0.88 m apart. Both are then released and accelerate toward each other. How fast is each particle moving when the separation between them is one-third its initial value?

Physics - Elena, Monday, February 18, 2013 at 3:27pm
k =9•10⁹ N•m²/C²,
q=4.8•10⁻⁶ C
m=5.5•10⁻³ kg
r=0.88 m

PE₁-PE₂=2KE
-kq²/r +3kq²/r =2mv²/2
2kq²/r =2mv²/2
kq²/r =mv²/2
v=sqrt( kq²/rm) =
=sqrt{9•10⁹•(4.8•10⁻⁶)²/0.88•5.5•10⁻³} =
=6.55 m/s

Answer this Question

Related Questions

Physics - Two particles each have a mass of 5.5 10-3 kg. One has a charge of +4....
physics - Two particles each have a mass of 6.7 x 10-2 kg. One has a charge of +...
Physics - 1)Three positive particles of charges 9µC are located at the ...
physics - One particle has a mass of 3.38 x 10-3 kg and a charge of +7.76 &...
physics - One particle has a mass of 3.00*10-3 kg and a charge of +7.60 &#...
Science - Use the following values for mass and charge: an electron has mass me...
Science - Use the following values for mass and charge: an electron has mass me...
physics - Two particles, with identical positive charges and a separation of 2....
Physics - Rutherford, Geiger, and Marsden (his students) fired a beam of alpha ...
science - 4. If the same two dust particles have -1.0  10-10 C of ...

For Further Reading

First Name:
School Subject:
Answer: