| Force F on a particle moving in a straight line varies with distance d as shown in the figure. The work done on the particle during its displacement of 12 m is [AIPMT (S) 2011] |
 |
A) 21 J
B) 26 J
C) 13 J
D) 18 J
Correct Answer: C
Solution :
| Work done = Area under \[(F-x)\] graph |
| \[=2\times (7-3)+\frac{1}{2}\,\times 2\times (12-7)\] |
| \[=8+\frac{1}{2}\times 10\] |
| \[=8+5=13\,J\] |
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