The pilot of a new stealth helicopter, which has a mass of 15,000kg and was traveling at 180 m/s, accelerated to 250 m/s in 6 seconds to make sure he could rescue those in need. How much force was used to accelerate the helicopter and what was the helicopter’s final momentum?

It is increased due to the doppler effect. (apex)

There are no answer choices, so an example would be: it takes a long time and a lot of precision to sew a shirt by hand, so a machine was created to do the job instead.

Gravity, from the center of mass of the box, extending downward normal force, from the floor under the box, extending upward, equal to gravity push force, acting at a point on the box, extending in the direction of motion friction, acting at any point on the box directly opposite the push, extending directly opposite to the motion

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