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Physics help: uniform Circular motion?
A coin is placed on a vinyl stereo record making 33 1/3 revolutions per minute.
a) In what direction is the acceleration of the coin?
b) Find the magnitude of the acceleration when the coin in placed 5, 10, and 15 cm from the center of the record.
c) what force accelerates the coin?
d) In which of the three radii listed in (b) would the coin be most likely to fly off? why?
a) The coin is accelerating towards the center of the table. the formula is centripetal acceleration = velocity(squared) / radius.
b) use the same formula but you have to figure out the circumference with each radius, the velocity with each radius than figure out the acceleration of centripetal force.
c)the normal force accelerates the coin inwards, or in the case of a weight on a string, the tension force accelerates the weight to the center
d)the 15cm radius, because its traveling the fastest. the coins is traveling a greater distance in the same time as a coin 5cm from the center.
Hope that helps a bit lol
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