Weight is a measure of the gravitational force acting on an object, typically measured in units of Newtons (N). It is the product of an object's mass and the acceleration due to gravity.
Mass is the amount of matter an object contains, while weight is a measure of the force exerted on an object by gravity. Mass is constant, while weight can vary depending on the strength of the gravitational force acting on the object.
We feel weightless in space because there is no significant gravitational force acting on our bodies. In orbit around the Earth, for example, astronauts experience a constant state of freefall, causing the sensation of weightlessness.
Yes, weight can change with location due to variations in the strength of the gravitational force. The closer an object is to a massive body, the stronger the gravitational force and the greater the weight will be.
No, weight cannot be negative. It is a measure of force, and force is always a positive quantity. However, an object's weight can be represented as a negative value if it is in a state of freefall or if it is being pulled in the opposite direction of the gravitational force.