The acceleration due to gravity on the moon is about 1.6 m/s . If you weigh 539 N of Earth, how much would you weigh on the moon

88 N

Explanation:

If you weigh 539 N of Earth, your mass = 539/9.8 = 55kg

The acceleration due to gravity on the moon is about 1.6 m/s and your weight will be 55*1.6 = 88 N on the moon.

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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probably not if net force is zero