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9I
Key Stage 3 Science
| Question | Answer |
|---|---|
| Describe the motion of an object when the forces are balanced and unbalanced | balanced- stationary, moving at a constant speed. Unbalanced- accelerating, changing direction, changing shape |
| State the law of conservation of energy | Energy cannot be created or destroyed only transferred from one store to another |
| What is the equation for speed | speed=distance/time |
| Define average speed and instantaneous speed average speed-how fast an oject is moving over a enitre distance. | Instantaneous speed- how fast an object is moving at a particular moment |
| How is speed calculated from a distance-time graph | gradient of the line on the graph |
| Describe an experiment including equipment needs to measure the speed of a runner | Tape measure to measure out a set distance (20m), a stop clock to measure the time taken to cover set distance, use equation speed=distance/time |
| Draw a simple see-saw and a wheelbarrow and label the load, pivot and effort in each diagram | see diagram in folder |
| What is a moment? How is a moment calculated | a turning effect of a force. Moment=force x distance |
| f you had to lift a heavy object up 2m what 2 simple machines could be used? Why would it be easier | a ramp or a pulley. Requires less force to move the object |
| What does dissapated mean? What types of energies are dissipated | Dissapated means spreads out. Sound and heat are usually dissapated |
Created by:
Davenant Foundation School
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