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Verified Answer :

Eodev

85+5=90 :DD
90-20=70 :DDD

Good lessons.

Answer:

8264 Joules

Explanation:

Mechanical Energy (ME) = Kinetic Energy (KE) + Gravitational Potential Energy (GPE)

Kinetic Energy = (0.5massvelocity^2)

Gravitational Potential Energy = (massheight9.8)

Note: The 9.8 in the GPE formula is Earth's gravity, it will be different on different planets.

ME = (0.5820^2) + (8859.8) = 8264

Substitute values into the variables, then put into calculator and solve.