Objects moving in a circle with a constant speed must have a force acting on it, directed towards the centre of the circle. This is the centripetal force.

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What is needed to create a centripetal force?

A resultant forced is needed (to create an acceleration).

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Factors affecting the centripetal force

Force, mass & acceleration F=MA

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The amount of centripetal force needed to keep an object in a circle depends on:(Mass)

...the greater the mass, the larger the force needed

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The amount of centripetal force needed to keep an object in a circle depends on:(Speed)

...the higher the speed, the larger the force needed

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The amount of centripetal force needed to keep an object in a circle depends on: (Radius of the Circle)

...the smaller the cirlce, the larger the force needed

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For cars the centripetal force is created...

...by the friction between the tyres and road surface

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(More on Cars) as the car travles at a constant speed, the forward and backward forces are balanced however....

....as it accelerates there is still a resultant force acting on it. This acts at right angles to the direction in whcih the car is driving

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Other cards in this set

Card 2

Front

A resultant forced is needed (to create an acceleration).

Back

What is needed to create a centripetal force?

Card 3

Front

Force, mass & acceleration F=MA

Back

Card 4

Front

...the greater the mass, the larger the force needed

Back

Card 5

Front

...the higher the speed, the larger the force needed

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