Physics
Grade-10
Easy
Question
When an object falls freely towards the earth, then its total energy:
- Decreases
- Increases
- First increases and then decreases
- Remains constant
Hint:
When a body falls freely then it moves under the influence of gravity only.
The correct answer is: Remains constant
When an object falls freely towards the earth, then its total energy: Remains constant
- When the body is at some height and it is at rest, then the energy possessed by the body is the potential energy and when the body falls freely then its potential energy starts decreasing but its kinetic energy keeps on increasing.
- So there is no loss of energy, at any point in time its total energy remains constant.
- The body's overall energy level doesn't change.
- Although the body's kinetic energy is changed from potential energy to kinetic energy, the overall amount of energy is constant.
- Thus, the energy of the body remains constant.
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