1
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
A circular platform is mounted on a frictionless vertical axle. Its radius R = 2 m and its moment of inertia about the axle is 200 kg m2. It is initially at rest. A 50 kg man stands on the edge of the platform and begins to walk along the edge at the speed of 1 ms$$-$$1 relative to the ground. Time taken by the man to complete one revolution is
A
$$\pi $$ s
B
$${{3\pi } \over 2}$$ s
C
2$$\pi $$ s
D
$${\pi \over 2}$$ s
2
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
A car of mass m is moving on a level circular track of radius R. If $$\mu $$s represents the static friction between the road and tyres of the car, the maximum speed of the car in circular motion is given by
A
$$\sqrt {{\mu _s}mRg} $$
B
$$\sqrt {{{Rg} \over {{\mu _s}}}} $$
C
$$\sqrt {{{mRg} \over {{\mu _s}}}} $$
D
$$\sqrt {{\mu _s}Rg} $$
3
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
The moment of inertia of a uniform circular disc is maximum about an axis perpendicular to the disc and passing through

AIPMT 2012 Mains Physics - Rotational Motion Question 54 English
A
B
B
C
C
D
D
A
4
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
Three masses are placed on the x-axis : 300 g at origin, 500 g at x = 40 cm and 400 g at x = 70cm. The distance of the centre of mass from the orgin is :
A
40 cm
B
45 cm
C
50 cm
D
30 cm
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