Physics

Problem

0.4\,\text{kg}

stone is released from rest at the top of a

15\,\text{m}

high cliff. Neglect air resistance and take

g = 10\,\text{m/s}^2

. a. (i) Calculate the total mechanical energy of the stone at the moment it is released. b. (ii) Determine its kinetic energy after it has fallen

9\,\text{m}