BBC Bitesize - KS3 Physics - Astronomy and space science - Revision 3
But weight is not exactly gravity, as much as an acceleration is not the force that's by gravitational fields, but has not weight, because, you know, no mass! . of gravitational force on the Earth, Newton derived the weight force relationship. Gravity is the attractive pull between two objects that have mass. The strength Weight is a measure of the force of gravity acting on an object. Study the solar system and how gravitational forces work with BBC Bitesize KS3 The weight of an object depends upon its mass and the gravitational field strength. of an object is the gravitational force between the object and the Earth .
Mass is the amount of matter. The metric or SI unit of mass is the kilogram. The English unit of mass is the slug or pound-mass.
The units of weight are units of force. The English unit of weight is the pound lb. See Confusion about Mass and Weight Units for more information. Measuring weight A spring scale is often used to measure an object's weight. Again, Hooke's Law is applied. The displacement a spring is stretched for a given force or weight is first calibrated. Then you can use the spring scale to measure the weight of various objects.
Astronomy and space science
Within a range of weights, the weight is proportional to the displacement stretched. Weight on the Moon The mass of an object—or the amount of matter it contains—is the same on the Moon as it is on the Earth.A Level Physics - Force, Mass, Acceleration and Newton's Second Law
However, the weight of the object is a function of the acceleration due to gravity. Summary Gravitational mass of an object is determined by using a balance scale to compare its mass with a unit mass.
- What are the differences between mass, weight, force and load? (FAQ - Mass & Density)
- What is Mass?
- What is Weight?
Inertial mass is the measurement of the mass of an object measured by its resistance to acceleration. Gravitational mass and inertial mass have been shown to be equivalent. Weight is defined as the force of gravity on a mass. Back to Top The quantity of matter present in a body is called Mass.
It remains unchanged irrespective of the shape, volume or position of the body. Its numerical value remains constant. It is a fundamental property of a body and numerical measure of inertia. In physics, we can classify mass into two types namely gravitational mass and inertial mass.
Mass, Weight and Gravity by Ron Kurtus - Physics Lessons: School for Champions
If we compare the masses of the body by using a beam balance against standard masses then the gravitational mass of a body could be determined. The force exerted by the gravity on a body due to which it is pulled towards the Earth is called the weight of a body.
It is measured by mass of a body times the acceleration due to gravity. The weight of a body on Earth would remain constant whereas the weight on moon would change as the acceleration due to gravity on moon is one-sixth to that of Earth.
Relation between mass and weight: It is the amount of force required by a body of mass one kilogram to produce an acceleration of one meter per Second Square Dyne is the CGS unit of force.