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Q6. A 3 kg mass rotates as a conical pendulum on a 1.6 m cord at constant velocity. The cord forms a 25° angle with the vertical axis of its fixing point.

Calculate EACH of the following:

(a) the instantaneous linear velocity of the mass;(8)

(b) the rotational frequency; (4)

(c) the change in height for an increase of 10% in angular velocity. (4)