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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