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Forces And Energy
forces and energy
| Question | Answer |
|---|---|
| When a force acts on a subject, what can it do? | The object can change shape, move and change speed. |
| What is a contact force? | A contact force is a force between two objects which are physically touching. |
| What is a non- contact force? | A non-contact force is a force which occurs when objects are physically separated. |
| What is a balanced force? | A balanced force when 2 or more forces are acting in opposite directions that are the same size. |
| What is friction (contact force)? | Friction is a force that occurs when 2 moving objects are in contact. |
| What is gravity (non-contact force)? | Gravity is the “pull” of the Earth on objects. |
| What is pressure caused by? | Pressure is caused by particles a force to a surface. |
| What is speed? | Speed is the amount of distance travelled in a given amount of time. |
| What are the names of the energy stores? | The names of the energy stores are kinetic, internal, elastic potential, gravitational potential, electrical, magnetic, chemical and nuclear. |
| What are the names of energy transfers? | The names of the energy transfers are mechanical work, electrical work, radiation and heating. |
| What piece of equipment do we use to measure a force? | We would use a piece of equipment called a Newton Meter. |
| What is the law of conservation of energy. | The law is that energy cannot be created or destroyed, it can only be transferred into other energy stores. |
| What is the unit for force? | The unit for force is Newtons, N. |
| What is the unit for distance? | The unit for distance is meters, m. |
| What is the unit for energy? | The unit for energy is Joules (J). |