- Free fall is motion under the influence of gravity alone. - Total mechanical energy (E) = Kinetic Energy (KE) + Potential Energy (PE). - As the body falls, PE (mgh) decreases because h decreases, and KE (1/2 mv²) increases because speed v increases. - In the absence of non-conservative forces like air resistance, the decrease in PE is exactly equal to the increase in KE, keeping the total energy constant.
When a body falls freely towards the earth, then its total energy :
Asked in OPSC CS Prelims 2019 · Topic: Motion under Gravity (Conservation of mechanical energy in motion under gravity)
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