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How much work is done by a person lifting 20kg object from the bottom of a well at a constant speed of 2 m/s for 5s

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Answer:

  • 1960 Joules

Explanation:

The formula to calculate the Work done is given by,

Work done = Force × Distance

To calculate the work done, first we need to know that force and distance.

Force can be calculated by, Force = mg

where :

  • m is mass of the body, and
  • g is acceleration due to gravity. (9.8 m/s²)

According to the question, we have Mass of object = 20 kg.

So,

⇒️ Force = 20 kg × 9.8 m/s²

⇒️ Force = 196 N

Now, Distance can be calculated by,

⇒️ Distance = Speed × time

⇒️ Distance = 2 × 5

⇒️ Distance = 10 metres.

Now,

Work done = Force × distance

⇒️ 196 × 10

⇒️ 1960 Joules

Therefore, the required work done is 1960 joules.

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