Question

1) A rock of mass 1.50kg is released from rest at a height of 30m. Ignore air resistance and

calculate;
(a) its speed half way down
(b) its speed on reaching the ground
(c) its total mechanical energy
(i) at a height of 30m
(ii) its kinetic energy half way through
(iii) its potential energy on striking the ground

Answer 1

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