Q. A 77.9-kg fireman slides down a 4.13-m pole by applying a frictional force of 343 N against the pole with his hands. If he slides from rest, how fast is he moving once he reaches the ground?
Q. A 500 turn solenoid, 25 cm long, has a diameter of 2.8 cm. A 10 turn coil is wound tightly around the center of the solenoid. If the current in the solenoid increases uniformly from 0 to 5.0 A in 0.57 s, what will be the induced emf magnitude in the short coil during this time?