183386
Descrição
FlashCards por fahimarehman04, atualizado more than 1 year ago
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Criado por fahimarehman04
aproximadamente 11 anos atrás
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| Questão | Responda |
| Why do all objects fall with the same acceleration? | Because of gravity as long as the effect of air resistance is very small. |
| The size on the air resistance force on a falling object depends on what? | It's cross sectional area-the larger the area the greater the air resistance. It's speed-the faster it falls the greater the air resistance. |
| When does air resistance have a significant on motion? | When it is large compared to the weight of the falling object. The speed of a free fall parachutist changes as he falls to earth. |
| Why do drag racers use parachutes? | To slow down them rapidly. |
| Give some information on gravitational field strength: | It is unaffected by atmospheric conditions. Varies with position on the earths surface. Varies with height above or depth below the earths surface. |
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