The default unit of rotational speed is 'radians per second' or 'rad/s'. If a someone sits at the edge of a 5m radius carousel a
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Answer:
This question is incomplete
Explanation:
The completed question is in the attachment to this question
The two objects (X and Y) at rest had a potential energy of Mx.gH and My.gH respectively because the formula for potential energy (P.E) is mgh. Where m is the mass of the object, g is acceleration due to gravity and h is the height of the object above the ground. Hence, Mx and My are the masses of X and Y respectively.
The change in there potential energy to kinetic energy and back to there potential energy will be
P.E of Y - P.E of X (because mass of Y is larger and will hit the floor first)
Hence, My.gH - Mx.gH ⇔ (My - Mx)gH
Correct option is C
