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9 Cards in this Set

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What are the characteristics of interaction pairs?
Equal in size
Opposite in direction
Act on different objects
Explain how cars move, using terms about interaction pairs
The tyres push backwards against the ground, the interaction pair is the ground pushing the car forward
Explain how rockets move, using terms about interaction pairs
Hot gas is pushed out of the base of the rocket, this leads to the rocket being pushed upwards, in the opposite direction
What is the upwards force exerting by a surface called?
Reaction
Define resultant force
The sum of all the forces adding together
How do you calculate the average speed?
Distance / Time
Define Instantaneous speed
Speed at a particular moment
Explain how the police use radar guns to measure a vehicles speed
The guns bounce microwave radiation off approaching cars, the guns then pick up the radiation and calculate the speed
Define velocity
The speed in a certain direction