11720334
Descripción
Fichas por Noshin Nuhash, actualizado hace más de 1 año
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Creado por Noshin Nuhash
hace más de 6 años
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| Pregunta | Respuesta |
| What is a gravitational force? | Gravitational force is the force of attraction between masses. |
| What are the two important effects of gravity? | 1) On the surface of a planet, it makes all things fall towards the ground. 2) It gives everything a weight. |
| What is mass? | Mass is just the amount of 'stuff' in an object. For any given object this will have the same value anywhere in the universe. |
| What is weight? | Weight is the force acting on an object due to gravity (the pull of the gravitational force on the object). |
| Why does the gravitational field strength vary with location? | It's stronger the closer you are to the mass causing the field, and stronger for larger masses. |
| What does the weight of an object depend on? | The strength of the gravitational field at the location of the object. |
| What is weight measured in? | Weight is a force measured in newtons. |
| What is its centre of mass? | When the force is acting from a single point on the object. This is a point which you assume the whole mass is concentrated. |
| What is weight measured using? | A calibrated spring balance or newton meter. |
| What is mass measured in? | Kilograms |
| What are mass and weight? | Mass and weight are directly proportional. |
| Equation: |
Weight(N)=Mass(kg) x Gravitational Field Strength(N/kg)
Image:
Small (binary/octet-stream)
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| Who discovered gravity? | Sir Isaac Newton |
| What is a force? | A push or pull acting on an object. It can cause an object to move or change direction. |
| What other forces act on moving objects? | Friction, air resistance, counteracting gravity. |
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