A 0.3 kg rock suspended in a string is swung to move in a circular path, which has a radius of 0.5 m at a rate of two revolutions per second. What is the speed of the rock? What is the centripetal acceleration and centripetal force acting on the rock?
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A 0.3 kg rock suspended in a string is swung to move in a circular path, which has a radius of 0.5 m at a rate
Answer:
Figure 1. The directions of the velocity of an object at two different points are shown, and the change in velocity Δv is seen to point directly toward the center of curvature. (See small inset.) Because ac = Δv/Δt, the acceleration is also toward the center; ac is called centripetal acceleration. (Because Δθ is very small, the arc length Δs is equal to the chord length Δr for small time differences.)