This is a negative value for two reasons; the force acting between them is attractive, and the zero of potential energy is at infinite separation. This is a negative result if the force between the two charges is attractive (they are opposite) and positive if it is repulsive (the charges are similar).
Why is potential energy negative for attraction?
well, the answer to this is simple. this is because at infinity we assume the p.e of any body to be 0, as force is 0. At distances lesser than infinity (i.e, in vicinity of attraction) the p.e will be lesser( energy decreases with decrease in distance) , which will obviously be negative.
Why potential energy is positive when force is repulsive?
In general when the force is attractive, the potential energy is negative and as shown above force will be negative. In case of repulsion, with the same argument, the force will be positive.
What does it mean if potential energy is negative?
A negative potential energy means that work must be done against the electric field in moving the charges apart!
Is negative potential attractive?
Remember the rule: Opposites attract; Likes repel. A positive charge would be repelled by something that already has a positive potential, while a negative charge would be attracted to the very same object.
Is negative force attractive or repulsive?
When the charges have opposite sign, the force is attractive (negative F), while if both charges have the same sign, the force is repulsive (positive F).
Is attraction positive or negative?
For example, electrons are negatively charged, and atomic nuclei are positively charged. … Like charges repel each other; unlike charges attract. Thus, two negative charges repel one another, while a positive charge attracts a negative charge. The attraction or repulsion acts along the line between the two charges.
Is Negative attractive or repulsive?
Coulomb Force — from Eric Weisstein’s World of Physics. The Coulomb force between two or more charged bodies is the force between them due to Coulomb’s law. If the particles are both positively or negatively charged, the force is repulsive; if they are of opposite charge, it is attractive.
Is negative potential energy kinetic energy?
Since kinetic energy is based on motion, it is always a positive value. If it is not in motion, the kinetic energy of that object is zero. Kinetic energy can never be a negative value.
Does negative force implies attractive nature?
Like charges repel and unlike charges attract. Coulomb’s law describes a force of infinite range which obeys the inverse square law, and is of the same form as the gravity force. … A negative force implies an attractive force. The force is directed along the line joining the two charges.
What is attractive potential energy?
If the potential energy decreases as it approaches the object then it is an attractive potential. If it increases then it is a repulsive potential. Jun 17, 2010.