TS EAMCET · Physics · Gravitation
While a person climbs stairs, the gravitational potential energy of the person increases. The source of this energy is
- A Work done by normal force from the steps
- B Work done by frictional force from the steps
- C Work done by air resistance
- D Work done by internal forces within the person's body
Answer & Solution
Correct Answer
(D) Work done by internal forces within the person's body
Step-by-step Solution
Detailed explanation
When a person climb stairs, work is done against the Gravitational force which is acting in the downward direction. This work against gravity is done by the cost of internal forces within the person's body. Hence option (4) is the correct answer.
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