NEET / AIIMS
Only One Option Correct Type- A ‘T ’ shaped object with dimension shown in the
gure, is lying on a smooth oor. A force F is applied
at the point P parallel to AB, such that the object
has only the translational motion without rotation.
Find the location of P with respect to C.
(a)4
3
l(b) ll2 lAFPCB(c)2
3
l(d)3
2
l- A particle of mass m moving with velocity u makes
an elastic one dimensional collision with a stationary
particle of mass m. ey are in contact for a brief
time T. eir force of interaction increases from
zero to F 0 linearly in time T
2
and decreases linearlyto zero in further time T
2. e magnitude of F 0 is
(a)mu
T(b)2 mu
T(c)mu
2 T^ (d) None of these- A circular ring of mass 6 kg and radius a is placed
such that its centre lies at the origin. Two particles
of masses 2 kg each are placed at the intersecting
points of the circle with positive X-axis and positive
Y-axis. en, the angle made by the position vector
of centre of mass of entire system with X-axis is
(a) 45° (b) 60°(c) tan−
1 4
5
(d) 30°- e motor of an engine is rotating about its axis
with an angular velocity of 100 rpm. It comes to rest
in 15 s, a er being switched o. Assuming constant
angular deceleration. What are the numbers of
revolutions made by it before coming to rest?
(a) 12.5 (b) 40 (c) 32.6 (d) 15.6 - Two uniform rods of equal
length but dierent masses
are rigidly joined to form an
L-shaped body, which is then
pivoted as shown in gure. If in
equilibrium the body is in the
shown con guration, ratio M/m will be
(a) 2 (b) 3 (c) 2 (d) 3 - Four point masses each
of value m, are placed at
the corners of a square
ABCD of side l. e
moment of inertia of
the system about an axis
passing through A and
parallel to BD is
(a) 3 ml^2 (b) 3 ml^2 (c) ml^2 (d) 2ml^2
M30°90°mAXDOBllCYSystem of Particles
and
Rotational Motion
Class XI
Total Marks : 120 Time Taken : 60 Min.