A lemon with mass 0.3 kg falls out of a tree from a height of 18 m. how much mechanical energy does the lemon have just before it hits the ground?

Answer is: the objects mechanical energy is 52,92 J.

m (object) = 0,3 kg.

h (object) = 18 m.

g = 9,8 m/s².

E (object) = m·g·h.

E (object) = 0,3 kg · 9,8 m/s² · 18 m.

E (object) = 52,92 N·m = 52,92 J ...

g - the acceleration of free fall.

mg - weight of the object.