Question

Assertion (A): Total energy of freely falling body is constant at each point

Reason (R) : Kinetic energy of freely falling body is minimum, when it reaches at ground level. ​

Answer 1

Answer:

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Answer 2

Assertion (A) is true but the reason (R) is false.

• When a body is dropped from a certain height, the total amount of mechanical energy is constant at every point.
• As per the law of conservation of energy, the sum of potential and kinetic energy remains conserved here.
• But when the body reaches the ground, the value of v = √2gh, so kinetic energy, KE= 1/2mv² = mgh and the potential energy, PE = 0 here as h=0.
• Hence, the assertion is true but the reason is false.