# Four charges are the corners of a square with B and C on opposite corners. Charges A and D on the other two corners have equal charge while both B and C have a charge of +1.0 C. What is the charge on A so that the force B is zero?

Four charges are the corners of a square with B and C on opposite corners. Charges A and D on the other two corners have equal charge while both B and C have a charge of +1.0 C. The charge on A so that the force B is zero is -0.35C

## Related Questions

An object on the end of a spring with spring constant k moves in simple harmonic motion with amplitude A and frequency f. Which of th following is a possible expression for the kinetic energy of the object as a function of time t? (A) kA2 sin2 (2Tft) (B) AkA cos (2T ft) (C) kA sin (2n ft) (D) kA cos (2Tt ft)

Explanation:

It is given that, an object on the end of a spring with spring constant k moves in simple harmonic motion with amplitude A and frequency f.

The equation of a particle executing SHM is given by :

.........(1)

Where

A is the amplitude of the wave

Differentiating equation (1) wrt t as :

.........(2)

The kinetic energy of the particle is given by :

.........(3)

We know that,

So, equation (3) becomes :

or

So, the kinetic energy of the object is . Hence, this is the required solution.

What do ocean waves and sound waves have in common?

Since they are both examples of moving waves, they both transmit energy.

Both are mechanical waves.

Explanation: Plato user

Will Upvote!! If the mass of two objects increases, the force of gravity between them

increases
decreases
remains the same
could increase or decrease, depending on the shape of the objects