Question

Assertion:during a freely falling of a body kinetic energy increases point-to-point
reason:mechanical energy of a freely falling body remains conserved

Answer 1

Answer:

assertion is true but the reason is false

Answer 2

Explanation:

• Mechanical energy of a free falling body remains  conserved as the potential energy of the body during free fall keeps getting converted into the kinetic energy of the body.

• At top height the whole of the kinetic energy is in the form of gravitational potential energy and as the body descends down this mechanical energy is gets converted in the form of kinetic energy of the body.

• As the body descends the velocity of the body increases and we know that the kinetic energy is due to the velocity of a body.

$KE=\frac{1}{2} m.v^2$

• The gravitational potential energy is due to the position of the body in the gravitational field.

$PE=m.g.h$

$m=$ mass of the body

$g=$ acceleration due to gravity

$h=$height of the body

$v=$ velocity of the body

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TOPIC: potential energy

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