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Questions
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1
JEE Main 2021 (Online) 20th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
A body rolls down an inclined plane without slipping. The kinetic energy of rotation is 50% of its translational kinetic energy. The body is :
A
Solid sphere
B
Solid cylinder
C
Hollow cylinder
D
Ring
2
JEE Main 2021 (Online) 18th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
A particle of mass m moves in a circular orbit under the central potential field, $$U(r) = - {C \over r}$$, where C is a positive constant. The correct radius $$-$$ velocity graph of the particle's motion is :
A
JEE Main 2021 (Online) 18th March Evening Shift Physics - Rotational Motion Question 47 English Option 1
B
JEE Main 2021 (Online) 18th March Evening Shift Physics - Rotational Motion Question 47 English Option 2
C
JEE Main 2021 (Online) 18th March Evening Shift Physics - Rotational Motion Question 47 English Option 3
D
JEE Main 2021 (Online) 18th March Evening Shift Physics - Rotational Motion Question 47 English Option 4
3
JEE Main 2021 (Online) 18th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Consider a uniform wire of mass M and length L. It is bent into a semicircle. Its moment of inertia about a line perpendicular to the plane of the wire passing through the center is :
A
$${1 \over 4}{{M{L^2}} \over {{\pi ^2}}}$$
B
$${1 \over 2}{{M{L^2}} \over {{\pi ^2}}}$$
C
$${2 \over 5}{{M{L^2}} \over {{\pi ^2}}}$$
D
$${{M{L^2}} \over {{\pi ^2}}}$$
4
JEE Main 2021 (Online) 18th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
A solid cylinder of mass m is wrapped with an inextensible light string and, is placed on a rough inclined plane as shown in the figure. The frictional force acting between the cylinder and the inclined plane is :

JEE Main 2021 (Online) 18th March Evening Shift Physics - Rotational Motion Question 48 English
[The coefficient of static friction, $$\mu$$s' is 0.4]
A
0
B
5 mg
C
$${7 \over 2}$$ mg
D
$${{mg} \over 5}$$
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