Laws of Motion

JEE Main level, numerical answer, medium

38 of 210

Question 38 of 210

Consider a frame that is made up of two thin massless rods ABAB and ACAC as shown in the figure. A vertical force P⃗\vec{P} of magnitude 100N100N is applied at point AA of the frame.

Suppose the force is
P⃗\vec{P} resolved parallel to the arms ABAB and ACAC of the frame. The magnitude of the resolved component along the arm ACAC is xNxN. The value of xx, to the nearest integer, is ________.
[Given :
sin⁡(35∘)=0.573,cos⁡(35∘)=0.819,sin⁡(110∘)=0.939,cos⁡(110∘)=−0.342\sin \left(35^{\circ}\right)=0.573,\cos \left(35^{\circ}\right)=0.819,\sin \left(110^{\circ}\right)=0.939,\cos \left(110^{\circ}\right)=-0.342]

Show answer and solution

Answer: 82


Component along
ACAC
=100cos⁡35∘N=100\cos 35^{\circ}N
=100×0.819N=100\times 0.819N
=81.9N=81.9N
≈82N\approx 82N

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