1
WB JEE 2020
MCQ (More than One Correct Answer)
+2
-0
Change Language
Two metallic spheres of equal outer radii are found to have same moment of inertia about their respective diameters. Then, which of the following statement(s) is/are true?
A
The two spheres have equal masses.
B
The ratio of their masses is nearly 1.67 : 1.
C
The spheres are made of different materials.
D
Their rotational kinetic energies will be equal when rotated with equal uniform angular speed about their respective diameters.
2
WB JEE 2020
MCQ (More than One Correct Answer)
+2
-0
Change Language
A simple pendulum of length l is displaced, so that its taught string is horizontal and then released. A uniform bar pivoted at one end is simultaneously released from its horizontal position. If their motions are synchronous, what is the length of the bar?
A
$${{3l} \over 2}$$
B
l
C
2l
D
$${{2l} \over 3}$$
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