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1.)Solve for the gravitational potential energy of a 225 kilogram Ferris wheel cart that is
suspended 20 meters above the ground.


2.) A heavy-duty helical spring has a spring constant of 27 N/m. When it was placed with a load under it, the spring is compressed at a distance of 0.78 m. Solve for the elastic potential energy of the spring.



3.) Solve for the kinetic energy of an airplane that is taking off at 119 m/s. The average mass of the plane is 85, 000 kilograms.

help?​