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- The weight of an object is the force on it due to the gravitational pull of gravity at that point. Since it is a force, weight is measured in Newtons (not kilograms).
www.bbc.co.uk/bitesize/guides/z6x48xs/revision/3Weight, mass and gravity - Gravity and weight - 3rd level ...
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Weight varies dramatically if we leave Earth’s surface. On the Moon, for example, acceleration due to gravity is only 1.67 m/s 2. A 1.0-kg mass thus has a weight of 9.8 N on Earth and only about 1.7 N on the Moon.
- 7.2: Force, Mass, and Weight
The weight and the mass are related by a factor of g, but...
- 7.2: Force, Mass, and Weight
May 20, 2024 · Therefore, the SI unit of weight can be measured in kg⋅m/s2 (kilograms times metres per second squared) which is equal to a newton (N). Since weight is the force extended by the gravitational force on a mass it is represented by the formula W = m*g, where weight can be kg * m/s2 which is equal to N.
The value of g allows you to determine the net gravity force if it were in freefall, and that net gravity force is the weight. Another approach is to consider "g" to be the measure of the intensity of the gravity field in Newtons/kg at your location.
Aug 21, 2021 · The weight and the mass are related by a factor of g, but are not the same. For more information on why the value of the mass is the same, whether the force is gravity or some other force, see Going Further 7.2: Gravity and Inertia.
- The Difference Between Mass and Weight
- Units of Mass and Weight
- Mass vs Weight Activities
- References
There are several differences between mass and weight. Mass is an intrinsic property of matter. It doesn’t change depending on where you measure it. It is a scalar value, which means it has magnitude, but no direction associated with it. The mass of an object is never zero. You measure mass with an ordinary balance on Earth or an inertial balance i...
We measure weight in grams, kilograms, ounces, and pounds. Technically, grams (g) and kilograms (kg) are units of mass. The SI unit of force is the Newton (N), with a 1 kg mass having a force of 9.8 N on Earth. The US unit of force is the pound (lb), while the unit of mass is something called a slug. A pound is the force required to move a 1 slug m...
Weight in an Elevator
One simple activity to see the difference between mass and weight is weighing yourself in an elevator. A digital scale works best because it’s easier to see the change in weight as the elevator ascends (increasing acceleration, which adds to gravity) and descends (negative acceleration, which decreases the effect of gravity). For a classroom activity, first have students weigh themselves (or an object) on a scale and discuss whether the value they obtain is mass, weight, or whether it matters...
Measuring Weight With Rubber Bands
You can compare the weights of objects by hanging them from rubber bands. On Earth, gravity affects a heavier object more than a lighter one and stretches the rubber band further. Predict what will happen when heavy and light objects are suspended from rubber bands on the ISS. What shape will the rubber band take? Do you expect there to be a difference between the way the rubber band responds to a heavy object compared to a light object?
Mass Cars
The easiest way to explore mass on Earth is to conduct experiments that move horizontally rather than vertically. This is because objects can’t change their position from the effect of gravity. Build a “mass car” and use an air pump to accelerate the mass across rollers or a low-friction track. Change the mass of the car, make a prediction about how this will change how far the car rolls, and perform an experimentto test the hypothesis. You can graph the distance the car moves compared to its...
Galili, Igal (2001). “Weight versus Gravitational Force: Historical and Educational Perspectives.” International Journal of Science Education. 23(1): 1073-1093.Gat, Uri. (1988). “The Weight of Mass and the Mess of Weight.” Standardization of Technical Terminology: Principles and Practice. ASTM. 2: 45-48.Hodgman, Charles D., editor. (1961). Handbook of Chemistry and Physics(44th ed.). Chemical Rubber Co. 3480-3485.Knight, Randall Dewey (2004). Physics for Scientists and Engineers: a Strategic Approach. Pearson.The weight of something depends on its mass and the gravitational field strength. Weight is measured in Newtons and mass is measured in kilograms. Weight is a force.
Weight is the force acting on an object due to gravity - it has the unit newtons (N) and acts towards the centre of a gravitational field. The weight of an object can be measured using a...
