The principle of conservation of mechanical energy states that in an isolated system, where only conservative forces (such as gravity) are doing work, the total mechanical energy (the sum of kinetic a

4.1
The principle of conservation of mechanical energy states that in an isolated system, where only conservative forces (such as gravity) are doing work, the total mechanical energy (the sum of kinetic and potential energy) remains constant.

4.2

Step 1: Identify given values.
Mass of steel ball, $m = 0.5 \, \text{kg}$
Height of point B, $h_B = 0.6 \, \text{m}$
Velocity at point B, $v_B = 3 \, \text{m/s}$
Acceleration due to gravity, $g = 9.8 \, \text{m/s}^2$

Step 2: Calculate the kinetic energy at point B.

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