Ahelicopter (m = 3250 kg) is cruising at a speed of 56.9 m/s atan altitude of 185 m. what is the total mechanical energy of thehelicopter? a) 6.91 x 107 jb) 5.26 x 107 jc) 1.12x 108 jd) 2.27 x 108 je) 3.91 x 107 j

Amerry-go-round of radius r, shown in the figure, is rotating at constant angular speed. the friction in its bearings is so small that it can be ignored. a sandbag of mass m is dropped onto the merry-go-round, at a position designated by r. the sandbag does not slip or roll upon contact with the merry-go-round. how would you rank the following different combinations of m and r on the basis of the angular speed of the merry-go-round after the sandbag "sticks" to the merry-go-round from largest to smallest. a) m = 10kg, r = 0.25r b) m = 20kg, r = 0.25r c) m = 10kg, r = 0.50r d) m = 10kg, r = 1.0r e) m = 15kg, r = 0.75r f) m = 40kg, r = 0.25r