Answer:
8264 Joules
Explanation:
Mechanical Energy (ME) = Kinetic Energy (KE) + Gravitational Potential Energy (GPE)
Kinetic Energy = (0.5*mass*velocity^2)
Gravitational Potential Energy = (mass*height*9.8)
Note: The 9.8 in the GPE formula is Earth's gravity, it will be different on different planets.
ME = (0.5*8*20^2) + (8*85*9.8) = 8264
Substitute values into the variables, then put into calculator and solve.
