Question

a pebble is released from a height of 5m. identify the major types of energies the pebble possesses when it reaches a heightof 0.5m from the ground

Answer 1

Let us consider the ground as reference for zero potential energy

then as we go up potential energy increases and as we go down potential energy decreases

In the question we are given that initial the pebble is at height 5m then pebble has P.E. = mg*5

and finally pebble comes to a state where its height is reduced to 0.5m then its P.E.=mg*0.5

we see that P.E has reduced and as we know that Total mechanical energy remains conserved

Hence that change in P.E. gets converted into Kinetic energy

The major types of energies the pebble possesses when it reaches a height of 0.5m from the ground are Potential and kinetic energy