which statement is true about weight
1) pull of earth on a body
2) mass of a body
3) scalar quantity
4) unit per kilogram
1) is true on Earth, but a mass can have weight anywhere there are other bodies exerting a gravitational force, such as on the Moon.
3) is not a suitable chice because, technically, weight is a vector force
I don't like any of the choices.
The correct statement about weight is:
1) Weight is the pull of Earth on a body.
To understand why this statement is true, let's break down the concepts related to weight:
1) The pull of Earth on a body: Weight is a force exerted by the gravitational field of the Earth on an object. It is a result of the gravitational attraction between the Earth and the object. The strength of this pull depends on the mass of the object.
2) Mass of a body: Mass refers to the amount of matter in an object. It is a fundamental property of an object and is measured in kilograms (kg). Mass remains the same regardless of the location of the object. In other words, it is an intrinsic property of the object.
3) Scalar quantity: Weight, unlike mass, is a vector quantity. It has both magnitude and direction. On the other hand, mass is a scalar quantity since it only has magnitude and no specific direction associated with it. Scalars are quantities that can be fully described by their magnitude alone, like temperature, time, or speed.
4) Unit per kilogram: This statement is incorrect. The unit used to measure weight is the Newton (N), not unit per kilogram. Weight is not expressed as a ratio of any other unit, but rather as a force. However, it is common to determine weight per kilogram in order to compare or express the gravitational force per unit mass.
In conclusion, statement 1 is true because weight is indeed the pull of Earth on a body.