Assertion (A): Mechanical energy of a freely falling body increases as it falls.
Reason (R): Potential energy is converted into kinetic energy during free fall.
Both A and R are true and R is the correct explanation of A
Both A and R are true and R is not the correct explanation of A
A is true but R is false
A is false but R is true

Question

Assertion (A): Mechanical energy of a freely falling body increases as it falls.

Reason (R): Potential energy is converted into kinetic energy during free fall.

Both A and R are true and R is the correct explanation of A
Both A and R are true and R is not the correct explanation of A
A is true but R is false
A is false but R is true

KnowledgeBoat · Accepted Answer

A is false but R is true Explanation Assertion (A) is false because in the case of a freely falling body (neglecting air resistance), the total mechanical energy remains constant. As the body falls, its potential energy decreases while its kinetic energy increases by an equal amount, so there is no increase in total mechanical energy. Reason (R) is true because during free fall, the body loses potential energy and gains kinetic energy; that is, potential energy is converted into kinetic energy. Therefore, assertion is false but reason is true.

Physics

Work, Energy & Power

Answer

Related Questions

According to law of conservation of energy, energy changes from one form to another form, but the total energy of that system
increases
decreases
alternates
remains the same

Water is lifted from ground floor to overhead tank at the second floor. The work done is stored in the form of :
kinetic energy
chemical energy
potential energy
both kinetic energy and chemical energy

Assertion (A): A stretched bow has kinetic energy.
Reason (R): Stretching stores potential energy.
Both A and R are true and R is the correct explanation of A
Both A and R are true and R is not the correct explanation of A
A is true but R is false
A is false but R is true