Neil studied how a pulley helps move an object. Neil tied a rope to an object with a mass of 10 kilograms (kg) and attached it to a pulley. He then pulled down on the rope.

When Neil pulled down on the rope, which did he most likely learn about the force required to lift the object?

It was half of the weight of the object.

It was equal to the weight of the object

It was two times the weight of the object.

It was three times the weight of the object.

answer: the correct answer is   air pressure at the top of mount everest is higher than at the bottom of the grand canyon.

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explanation:

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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v 154.9= 0.9 length length s little over 154.9cm

a is the best answer your welcome