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Science Flashcards

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What is the difference between speed and velocity? * Speed is how fast you’re going * Velocity is how fast you’re going but you need to add direction of the way you’re going in.

What are different parts of a distance-time graph? * Flat sections up – steady speed * Flat line – stopped * Curved line up – accelerating * Line curving off – decelerating * Straight line down – steady speed in other direction

How do you calculate speed from a distance time graph? * Vertical / horizontal = speed

What is acceleration? * How quickly the velocity is changing * The change in velocity can be a change in speed, or direction or both

How to calculate acceleration? * Acceleration = change in velocity / time taken

What is each part of a velocity time graph? * Straight line up – accelerating * Straight line – constant speed * Curved line up – increasing acceleration * Straight line down – decelerating

How to find the distance travelled on a velocity time graph? * It is equal to the time interval underneath an area of a graph

What is mass and weight? * Mass Is the Amount of matter that makes up an object * Weight is the force which pulls a object to the ground

What is weight measured in? * It is a force measured in newton’s (N)

What is the resultant force? * The sum of all the forces acting on an object

What happens to an object if the resultant force is zero? * It will remain stationary
What happens to an object if there is no resultant force? * It will carry on moving at the same velocity

What happens to an object if there is a non-zero resultant force? * The object will accelerate in the direction of the force

How to calculate resultant force? * F=MxA

What happens when two forces interact? * The forces they exert on each other are

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