1
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
A solid cylinder of mass 2 kg and radius 4 cm is rotating about its axis at the rate of 3 rpm. The torque required to stop after 2$$\pi $$ revolutions is :
A
2 × 10–3 N m
B
2 × 10–6 N m
C
2 × 106 N m
D
12 × 10–4 N m
2
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
Two particles A and B are moving in uniform circular motion in concentric circles of radii rA and rB with speed vA and vB respecitively. Their time period of rotation is the same. The ratio of angular speed of A to that of B will be :
A
vA : vB
B
1 : 1
C
rB : rA
D
rA : rB
3
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Change Language
A disc of radius 2 m and mass 100 kg rolls on a horizontal floor. Its centre of mass has speed of 20 cm/s. How much work is needed to stop it?
A
1 J
B
2 J
C
3 J
D
30 kJ
4
NEET 2018
MCQ (Single Correct Answer)
+4
-1
Change Language
A solid sphere is in rolling motion. In rolling motion a body possesses translational kinetic energy (Kt) as well as rotational kinetic energy (Kr) simultaneously. The ratio Kt : (Kt + Kr) for the sphere is
A
7 : 10
B
5 : 7
C
10 : 7
D
2 : 5
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