Momentum: 3
Mass A has a mass of 10 kg while mass B has a mass of 20
kg. Which of these must be true?

D

Explanation:

F=ma

a=F/m

according to option D, F is constant

so acceleration is inversely proportional to mass and A has half the mass of B. Hence, acceleration of A will be twice of B if same force is applied.

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.

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the answer for apex is the lowest