Is An Attractive Force Positive Or Negative?

How do you find the force of attraction?

Calculate the force of attraction according to F = k * q1 * q2 / d2..

What happens when 2 forces pull in the opposite direction?

When two forces act in the same direction, they add together. When forces act in opposite directions, they are combined by subtracting the smaller force from the larger force. … Balanced forces acting on an object will not change the object’s motion. When you add equal forces in opposite direction, the net force is zero.

Which forces are attractive?

Concept Connections: The Four Basic ForcesForceApproximate Relative StrengthsAttraction/RepulsionGravitational10−38attractive onlyElectromagnetic10–2attractive and repulsiveWeak nuclear10–13attractive and repulsiveStrong nuclear1attractive and repulsive

What does positive force mean?

The physics definition of “work” is: … Work can be either positive or negative: if the force has a component in the same direction as the displacement of the object, the force is doing positive work. If the force has a component in the direction opposite to the displacement, the force does negative work.

How do you know if a force is repulsive or attractive?

If the particles are both positively or negatively charged, the force is repulsive; if they are of opposite charge, it is attractive. This called Coulomb’s law and was the first attempt to understand the electric force. Like the gravitational force, the Coulomb force is an inverse square law.

What is the force of repulsion?

Repulsive force may refer to: … Repulsive force (magnetism) between magnets of opposite orientation. A compressed material repelling bodies on both sides, e.g. according to Hooke’s law. Repulsive force (biology), associated with involuntarily vomiting, as in response to ingestion of a toxin.

Why does a negative sign indicate an attractive force?

2 Answers. The minus sign is to indicate that the force is attractive: if there was no minus sign, two masses would repel.

Is force of attraction negative?

Answers and Replies. In the usual radial coordinate system the positive r direction is outward. So a repulsive force is in the positive r direction and an attractive force is in the negative r direction .

Why is force of gravity negative?

Any object affected only by gravity (a projectile or an object in free fall) has an acceleration of -9.81 m/s2, regardless of the direction. The acceleration is negative when going up because the speed is decreasing. The acceleration is negative when going down because it is moving in the negative direction, down.

What are the 4 forces in the universe?

If you remember any of the physics you learned in school, it’s possible you may remember that there are four fundamental forces of nature. They are in no particular order gravity, electromagnetism, the weak nuclear force and the strong nuclear force.

Which is the weakest force in nature?

Actually, gravity is the weakest of the four fundamental forces. Ordered from strongest to weakest, the forces are 1) the strong nuclear force, 2) the electromagnetic force, 3) the weak nuclear force, and 4) gravity.

Can work done be 0?

Zero work: When force and displacement are perpendicular to each other, or when force or displacement is zero.

Can work done be negative?

Work is a measurement of energy, so it may seem odd to think that a work can be negative — but it can! Work is how much energy is done by a force over a distance.

What are the 4 types of forces?

Fundamental force, also called fundamental interaction, in physics, any of the four basic forces—gravitational, electromagnetic, strong, and weak—that govern how objects or particles interact and how certain particles decay. All the known forces of nature can be traced to these fundamental forces.