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Answer :
Final answer:
The acrobat does a total work of 102,900 J to climb the platform. This was calculated using the formula of work done which is 'Work done = mass x gravity x height'.
Explanation:
To answer this, we should first understand that the work done by an object is the force it applies multiplied by the distance it moves while applying that force. In this problem, we are dealing with the force of gravity which is applied to the acrobat as they climb the ladder.
Gravity is acting downward with a force equal to the mass of the acrobat multiplied by the acceleration due to gravity (9.8 m/s²). However, the acrobat is moving in the opposite direction, so the force they are applying is equal to the force of gravity but in the opposite direction.
So, to find the work done by the acrobat, we can multiply their mass (70 kg), the height of the platform (15 m), and the acceleration due to gravity (9.8 m/s²).
The calculation is as follows: Work done = mass x gravity x height = 70 kg x 9.8 m/s^2 x 15 m = 102,900 J.
Thus, the acrobat did a total work of 102,900 J to climb the platform.
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