A ball of mass 8 kg falls from a height of 100 m. Neglecting air resistance, calculate it's total energy after falling a distance of

Question

A ball of mass 8 kg falls from a height of 100 m. Neglecting air resistance, calculate it's total energy after falling a distance of
40 m

R_Scott · Answer

the gravitational potential energy from the 40 m fall becomes kinetic energy K.E. = m * g * h = 8 * 9.8 * 40 the ball still has 60 m worth of gravitational potential energy

henry2, · Answer

P.E. = M*g*h = 8*9.8*100 = 7840 J. = Potential Energy = Total energy. P.E. = Mgh = 8*9.8*(100-40) = 4704 J. = Total energy after falling 40 m. K.E.= 7840 - 4704 = 3136 J.