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QJEEM18Ph84ef: JEE Main 2018 Physics - Class 11 JEEM18Ph84ef Solution: A force of acts on a point at the end of an -shaped object, as…

A force of 4040 NN acts on a point BB at the end of an LL -shaped object, as shown in the figure. The angle θ\theta that will produce maximum moment of the force about point AA is given by :

JEE Main 2018 (Online) 15th April Morning Slot Physics - Rotational Motion Question 190 English

Multiple Choice Options

  • A tan⁡θ=12\tan \theta = {1 \over 2}
  • B tan⁡θ=2\tan \theta = 2
  • C tan⁡θ=4\tan \theta = 4
  • D tan⁡θ=14\tan \theta = {1 \over 4}

Step-by-Step Verified Solution

We can produce maximum moment of force, when line of action of force is perpendicular to line AB.

JEE Main 2018 (Online) 15th April Morning Slot Physics - Rotational Motion Question 190 English Explanation
∴    \therefore\,\,\,\, tan⁡θ\tan \theta = 24{2 \over 4} = 12{1 \over 2}

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