Question

Work and Energy help?

Answer 1

Here is my first question-A 2.00 kg package drops out of a plane. It hits the ground with a speed of 140 m/s. Using all you know about the conservation of energy and assuming none is lost to friction, determine what height the package was dropped from. Show your work.

Answer 2

You have to use conservation of energy. The potential energy due to gravity will completely converted into Kinetic energy. K.E = P.E = \[(1/2)Mv ^{2}= Mgh\]. (hope you can understand the symbols). Solving the equation we get \[h = v^2/(2g)\]. substitute the values you will get the answer.

Answer 3

Thank you so much!!!

Answer 4

1000 m?

Answer 5

Yes