8973776
Description
Flashcards by Sánchez - Genzor kids, updated more than 1 year ago
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Created by Sánchez - Genzor kids
about 7 years ago
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| Question | Answer |
| They make things move or still by pushing or pulling | FORCES |
| When an object or person moves another by touching it | CONTACT FORCES |
| Forces that move objects without touching it | NON CONTACT FORCES |
| Two forces are balanced when they are | EQUAL |
| When two forces are not balanced they make things... | MOVE |
| What type of force is magnetism? | Non contact force |
| Magnets are natural or manmade?? | Both |
| A natural magnet | The magnetite mineral |
| Man-made minerals are made from | iron and steel |
| What do magnets create around them?? | Magnet field |
| Magnets attract objects made of | iron and steel |
| Whats the name of the ends of the magnets?? | Poles |
| What are the names of the poles of the magnet?? | North and south |
| What happen to Two different poles? | they attract |
| What happen to Two same poles? | They repel |
| What type of force is Gravity?? | Non contact force |
| What does GRAVITY do? | Pulls towards their centre of the masses |
| What force have all the masses?? | GRAVITY |
| Can you always notice gravity?? | No, only with very large masses |
| What makes that everything that goes up... | comes back down |
| Who discovered Gravity? | Sir Isaac Newton |
| What happens to the moon because of gravity? | That is always at the same distance from the earth. |
| Whats the name of the amount of matter in an object?? | Mass |
| What can we use to measure mass?' | Kilograms |
| What is the unit of measurement of forces? | Newton |
| How can we calculate the measure of weight? | mass X gravity |
| What is the value of gravity? | 10 |
| What is the weight of a dog that has a mass of 15?? | mass x gravity = 15 x 10 = 150 Newtons |
| What is upthrust?? | A push force opposite to gravity |
| What does upthrust do to objects? | Push them up |
| What do apply upthrust? | water and air |
| What do influence the amount of upthrust?? | mass and volume |
| An object with small mass and big volume, how much upthrust has? | A lot |
| An object with big mass and small volume, how much upthrust has? | less |
| Who discovered upthrust? | Archimedes (an ancient greek) (2000 years ago) |
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