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Q. A 0.420-kg ball is dropped from rest at a point 1.30 m above the floor. The ball rebounds straight upward to a height of 0.580 m. What are the magnitude and direction of the impulse of the net force applied to the ball during the collision with the floor?

Q. A step-up transformer has 340 turns on its primary coil and 90,000 turns on its secondary coil. The EMF of the generator to which the primary circuit is attached is 55.0 V.

(a) What is the EMF in the secondary circuit?

(b) The current in the secondary circuit is 0.50 A. What current is in the primary circuit?

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