A person pushes a box on a rough horizontal plateform surface. He applies a force of 200 N over a distance of 15 m . Thereafter, he gets progressively tired and his applied force reduces linearly with

Question

A person pushes a box on a rough horizontal plateform surface. He applies a force of $200 N$ over a distance of $15 m$ . Thereafter, he gets progressively tired and his applied force reduces linearly with distance to $100 N$ . The total distance through which the box has been moved is $30 m$ . What is the work done by the person during the total movement of the box?

Options:

Answer:

D

Solution:

$W = area = (200 \times 15) + \frac{1}{2} (100 + 200) \times 15$

$= 3000 + 2250$

$W = 5250 J$

TestHub · Accepted Answer

W = area = ( 200 × 15 ) + 1 2 ( 100 + 200 ) × 15 = 3000 + 2250 W = 5250 J

Physics - W.E.P. Question with Solution | TestHub

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