L06.01 Forces in circular motion.pptx

# L06.01 Forces in circular motion.pptx - FORCE IN CIRCULAR...

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FORCE IN CIRCULAR MOTION drag revisited CH 5.5

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Concept 2
Centripetal Force From Newton’s laws we learned that acceleration requires a force. In the case of circular motion at constant angular speed (so called uniform circular motion), the only acceleration is radial (centripetal). This causes the change in direction of the velocity vector. Therefore, to cause the acceleration required to keep an object in circular motion, there must be a force directed inwards. This force is called the centripetal force . 3

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Centripetal is a type of Force The centripetal force is itself not a force, but one of the existing forces we’ve talked about can act as the centripetal force. So, to identify which force is acting as the centripetal force we should draw a free-body diagram and find the force which points towards the centre. 4
Identify the centripetal force A rock being horizontally spun around on a string.

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• Spring '13
• Lockhart

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