Term
| What are the characteristics of interaction pairs? |
|
Definition
Equal in size
Opposite in direction
Act on different objects |
|
|
Term
| Explain how cars move, using terms about interaction pairs |
|
Definition
| The tyres push backwards against the ground, the interaction pair is the ground pushing the car forward |
|
|
Term
| Explain how rockets move, using terms about interaction pairs |
|
Definition
| Hot gas is pushed out of the base of the rocket, this leads to the rocket being pushed upwards, in the opposite direction |
|
|
Term
| What is the upwards force exerting by a surface called? |
|
Definition
|
|
Term
|
Definition
| The sum of all the forces adding together |
|
|
Term
| How do you calculate the average speed? |
|
Definition
|
|
Term
| Define Instantaneous speed |
|
Definition
| Speed at a particular moment |
|
|
Term
| Explain how the police use radar guns to measure a vehicles speed |
|
Definition
| The guns bounce microwave radiation off approaching cars, the guns then pick up the radiation and calculate the speed |
|
|
Term
|
Definition
| The speed in a certain direction |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
| When two objects interact, what is the total change of momentum (taking direction into account) |
|
Definition
|
|
Term
|
Definition
| Where two objects push apart |
|
|
Term
| Explain what seatbelts are designed for |
|
Definition
| Seatbelts strech during a collision. This makes the change in momentum take longer. By increasing the time the collision lasts, this decreases the size of the force |
|
|
Term
Complete the sentence:
If the resultant force acting on an object is zero, the momentum of the object .......... |
|
Definition
|
|
Term
Complete the sentence:
If there is a resultant force acting on an object, the momentum of the object........... |
|
Definition
| Will change in the same direction as the resultant force |
|
|
Term
| When travelling at a steady speed, Driving force = |
|
Definition
|
|
Term
|
Definition
|
|
Term
| Lifting things increases their |
|
Definition
| Gravitational potential energy |
|
|
Term
| Making things speed up increases their |
|
Definition
|
|
Term
| Change in kinetic energy = |
|
Definition
Work done by a pushing force
= force x distance |
|
|
Term
| The amount of work depends on |
|
Definition
The force you have to exert
The distance moved in the direction of the force |
|
|
Term
| Amount of energy transferred = |
|
Definition
|
|
Term
| When a roller coaster runs down a slope, it |
|
Definition
|
|
