What is it about these minerals (iron, nickel and magnetite) that make the Earth one big magnet?

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

read more on -

the answer is a)

mark brainliest

in physics zero. in muscle fatigue could be high