A stone is swinging in a horizontal circle 0.8 m in diameter, at 30 rev/min. A distant light causes a shadow of the stone to be formed on a nearby wall. What is the amplitude of the motion of the shadow? What is the frequency? *
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Answer:
0.4 m, 2 s
Explanation:
As we see in the animation Its amplitude will be equal to its radius i.e. 0.4m and its time period will be equal to the time taken by the particle to complete one revolution. Since the particle makes 30 revolution per minute. it will take 2 minutes to complete one revolution. So the time period of the SHM is 2s.
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