The answer is d because that’s the lowest velocity and it’s a straight line showing it’s not going faster
It is when two atoms, or more, make a chemical bond by sharing atoms, using them together to get full energy levels. They do this instead of just taking electrons.
Mechanical Advantage= output force/input force. So, 156/52=3. You're MA is 3.
vf=vi-gt (at peak vf = 0)
vi=gt
44=9.8t
t=4.49 s
time return = time upward = 4.49 s