1
JEE Main 2021 (Online) 16th March Evening Shift
Numerical
+4
-1
Change Language
A force $$\overrightarrow F $$ = $${4\widehat i + 3\widehat j + 4\widehat k}$$ is applied on an intersection point of x = 2 plane and x-axis. The magnitude of torque of this force about a point (2, 3, 4) is ___________. (Round off to the Nearest Integer)
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2
JEE Main 2021 (Online) 16th March Morning Shift
Numerical
+4
-1
Change Language
Consider a 20 kg uniform circular disk of radius 0.2 m. It is pin supported at its center and is at rest initially. The disk is acted upon by a constant force F = 20 N through a massless string wrapped around is periphery as shown in the figure.

JEE Main 2021 (Online) 16th March Morning Shift Physics - Rotational Motion Question 98 English
Suppose the disk makes n number of revolutions to attain an angular speed of 50 rad s$$-$$1.

The value of n, to the nearest integer, is __________.

[Given : In one complete revolution, the disk rotates by 6.28 rad]
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3
JEE Main 2021 (Online) 16th March Morning Shift
Numerical
+4
-1
Change Language
Consider a frame that is made up of two thin massless rods AB and AC as shown in the figure. A vertical force $$\overrightarrow P $$ of magnitude 100 N is applied at point A of the frame.

JEE Main 2021 (Online) 16th March Morning Shift Physics - Rotational Motion Question 97 English
Suppose the force is $$\overrightarrow P $$ resolved parallel to the arms AB and AC of the frame.

The magnitude of the resolved component along the arm AC is xN.

The value of x, to the nearest integer, is ___________.

[Given : sin(35$$^\circ$$) = 0.573, cos(35$$^\circ$$) = 0.819

sin(110$$^\circ$$) = 0.939, cos(110$$^\circ$$) = $$-$$ 0.342 J
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4
JEE Main 2021 (Online) 24th February Evening Shift
Numerical
+4
-1
Change Language
A uniform thin bar of mass 6 kg and length 2.4 meter is bent to make an equilateral hexagon. The moment of inertia about an axis passing through the centre of mass and perpendicular to the plane of hexagon is _______ $$\times$$ 10$$-$$1 kg m2.
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