Answer:
B AND D
HOPE ITS HELF FUL .........
Bipolar disorder is the answer
by angular momentum conservation we will have
angular momentum of child + angular momentum of merry go round = 0
angular momentum of child = mvR
m = mass of child
R = radius of child
v = speed = 2 m/s
now let's say moment of inertia of merry go round is I
so we will have


so merry go round will turn in opposite direction with above speed
Answer:
maybe alternator..generator..
Equal to 50
law of reflection: angle of incidence equals angle of reflection