A helicopter lifts a 72  kg astronaut 15  m vertically from the ocean by means of a cable. The acceleration of the astronaut is g / 10 . How much work is done on the astronaut by (a) the force from the helicopter and (b) the gravitational force on her? Just before she reaches the helicopter, what are her (c) kinetic energy and (d) speed? | Numerade

(II) A 55-kg woman and a 72-kg man stand 10.0  m apart on frictionless ice. ( a ) How far from the woman is their CM? (b) If each holds one end of a rope, and the man pulls on the rope so that he moves 2.5  m, how far from the woman will he be now? (c) How far will the man have moved when he collides with the woman? | Numerade

Rare Footage of the attack on USS Bunker Hill on this day in 1945.On the morning of 11 May 1945, while supporting the invasion of Okinawa, Bunker Hill was struck and severely damaged by two Japanese kamikaze planes. A Mitsubishi A6M Zero fighter plane piloted by Lieutenant Junior Grade Seizō Yasunori emerged from low cloud cover, dove toward the flight deck on the starboard quarter and dropped a 550-pound (250 kilogram) bomb that penetrated the flight deck and exited from the side of the ship at