1
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
Two particles which are initially at rest, move towards each other under the action of their internal attraction. If their speeds are v and 2v at any instant, then the speed of centre of mass of the system will be :
A
2v
B
zero
C
1.5 v
D
v
2
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
A gramophone record is revolving with an angular velocity $$\omega $$. A coin is placed at a distance r from the centre of the record. The static coefficient of friction is $$\mu $$. The coin will revolve with the record if
A
r = $$\mu $$g$$\omega $$2
B
r < $${{{\omega ^2}} \over {\mu g}}$$
C
$$r \le {{\mu g} \over {{\omega ^2}}}$$
D
$$r \ge {{\mu g} \over {{\omega ^2}}}$$
3
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
A particle of mass M is situated at the centre of a spherical shell of same mass and radius a. The magnitude of the gravitational potential at a point sutuated at a/2 distance from the centre, will be :
A
$${{GM} \over a}$$
B
$${{2GM} \over a}$$
C
$${{3GM} \over a}$$
D
$${{4GM} \over a}$$
4
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
The radii of circular orbits of two satellites A and B of the earth, are 4R and R, respectively. If the speed of satellite A is 3V, then the speed of satellite B will be
A
$${{3V} \over 4}$$
B
6$$V$$
C
12$$V$$
D
$${{3V} \over 2}$$
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