1
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Change Language
A block A of mass m1 rests on a horizontal table. A light string connected to it passes over a frictionless pully at the edge of table and from its other end another block B of mass m2 is suspended. The coefficient of kinetic friction between the block and the table is $$\mu $$k. When the block A is sliding on the table, the tension in the string is
A
$${{{m_1}{m_2}(1 + {\mu _k})g} \over {({m_1} + {m_2})}}$$
B
$${{{m_1}{m_2}(1 - {\mu _k})g} \over {({m_1} + {m_2})}}$$
C
$${{\left( {{m_2} + {\mu _k}{m_1}} \right)g} \over {\left( {{m_1} + {m_2}} \right)}}$$
D
$${{\left( {{m_2} - {\mu _k}{m_1}} \right)g} \over {\left( {{m_1} + {m_2}} \right)}}$$
2
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Change Language
Two spherical bodies of mass M and 5M and radii R and 2R are released in free space with initial separation between their centres equal to 12R. If they attract each other due to gravitational force only, then the distance covered by the smaller body before collision is :
A
7.5R
B
1.5R
C
2.5R
D
4.5R
3
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Change Language
A rod of weight W is supported by two parallel knife edges A and B and is in equilibrium in a horizontal position. The knives are at a distance d from each other. The centre of mass of the rod is at distance x from A. The normal reaction on A is
A
$${{W\left( {d - x} \right)} \over x}$$
B
$${{W\left( {d - x} \right)} \over d}$$
C
$${{Wx} \over d}$$
D
$${{Wd} \over x}$$
4
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Change Language
A mass m moves in a circle on a smooth horizontal plane with velocity v0 at a radius R0. The mass is attached to a string which passes through a smooth hole in the plane as shown. the tension in the string is increased gradually and finally m moves in a circle of radius $${{{R_0}} \over 2}$$.

The final value of the kinetic energy is
AIPMT 2015 Cancelled Paper Physics - Rotational Motion Question 76 English
A
2mv$$_0^2$$
B
$${1 \over 2}$$mv$$_0^2$$
C
mv$$_0^2$$
D
$${1 \over 4}$$mv$$_0^2$$