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Movement terms
IGCSE Edexcel (9-1) Physics
| Question | Answer |
|---|---|
| What is speed? | Speed is the quantity that tells us how fast an object is moving |
| What is the equation for Average speed? | Average Speed = Total Distance travelled /Total time taken v=s/t |
| What are the units to measure distance in physics? | Metres |
| What are the units to measure time in physics? | seconds |
| What is the equation to calculate time taken? | Time= distance/speed |
| What is the equaton to calculate distance moved? | Distance = Speed x Time |
| How to covert m/s into km/h | Multiply m/s by 3.6 |
| What is Instantaneous Speed? | Instantaneous speed is the speed of a object at a particular time. |
| What is Uniform speed? | Uniform Speed is when an object travels same distance in same time intervals |
| In a distance Time graph , How to find the speed? | By calculating the gradient |
| Is distance a scalar or Vector quantity? | Scalar Quantity |
| Is speed a scalar or vector quantity | Scalar Quantity |
| Is displacement Scalar or Vector? | Vector |
| What is Displacement? | Displacement is distance travelled with direction |
| What does vector quantity have? | Magnitude and Direction |
| Give the equation for Average Velocity? | Average Velocity = Increase in Displacement/Time Taken |
| In displacement Time graphs if the line is going from left to right then what can you say about the object moving? | The object is moving backwards |
| What is Acceleration? | Acceleration is the rate of change in velocity |
| What is the equation to calculate acceleration? | Acceleration = (Final velocity-Initial velocity)/time |
| Give the symbolic equation for Acceleration? | a = (v-u)/t |
| How to find Final velocity/Increase in Velocity? | Final velocity = Initial Velocity + Acceleration x time v=u+at |
| Let's Say You needed to find the final velocity but without using time. What equation will you use? | Final velocity squared = Initial Velocity Squared + Acceleration x Distance |
| In displacement time - Graphs how to calculate the velocity | By calculating the gradient |
| In Velocity time graphs what does the gradient of the slope tell you? | The acceleration |
| In Velocity time graphs how to find the displacement | By calculating the area under the line/slope |
| Is Force a Scalar quantity or a Vector quantity | Vector |
| Who discovered the hookes law? | Robert Hookes |
| What does the hookes law state? | That the extension is directly proportional to the force applied.. |
| What happens when the force applied is increased? | The extension will not be proportional to the force applied and the graph becomes a little bit curved |
| What is the x axis .. Force applied or Extension | Extension |
| Will a object accelereate if there is a balanced force?? | No |
| What is force proportional to ? | Acceleration... |
| Acceleration is Inversly proportional to | mass |
| What is Drag coefficient? | Drag coefficiant is the measure of how easily an object moves through air |
| What is air resistance? | Air resistance is the force experienced by objects that move through air which opposes motion |
| When a object is at rest air resistance is ----Give a value---- | 0 |
| When a object is moving what happens? Explain in terms mentioning Air resistance | Air resistance acts on it and it increases and the speed of the object increases |
| Why when a object is at rest there is no air resistance | Because air drag or air resistance only acts on moving objects |
| Explain what happens when a skydiver jumps out of a plane? | He will accelerate for a while and eventually reach terminal velocity |
| Explain what happens when a skydiver opens his parachute? | This will cause a sudden increase in drag force. At this velocity the drag force of the parachute is greater than the weight of the parachute and for a while, he will decelerate |
| What happens as the parachutist slows down? | The drag force decreases and a new terminal velocity will be reached |
| What is momentum? | Momentum is a measurement on how hard it is to stop a moving object |
| Name 3 ways things that are in cars to minimize accidents? | Crumple zones Seat belts Air bags |
| What does Newtons 1st law of motion state? | Things don't speed up, slow down or change direction uless you push or pull them |
| What does newtons 2nd law of motion state? | The bigger the force acting on a object the faster it will speed up |
| What does newtons 3rd law of motion state? | Every Action has a equal and opposite reaction |
Created by:
kawi_is_studying
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