A 3.0 kg rock is attached to a rope that is 1.2 meters in length. The other end of the rope is attached to a motor that forces the rope to rotate with a rotational speed of 2.0 m/s. Calculate the magnitude of the centripetal force acting on the rock.
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Answer:
14.4 N
Explanation:
Rotational speed (Angular Velocity) = 2
Radius of the circle = 1.2 m
Therefore,
Velocity = Angular velocity × radius = 2×1.2 = 2.4 m/s
Therefore,
Centripetal force= mv²/r = 3 × 2.4×2.4/1.2 = 3 × 2.4 × 2
= 14.4 N
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