1
IIT-JEE 2011 Paper 2 Offline
MCQ (More than One Correct Answer)
+4
-2

A thin ring of mass 2 kg and radius 0.5 m is rolling without on a horizontal plane with velocity 1 m/s. A small ball of mass 0.1 kg, moving with velocity 20 m/s in the opposite direction hits the ring at a height of 0.75 m and goes vertically up with velocity 10 m/s. Immediately after the collision,

A
the ring has pure rotation about its stationary CM.
B
the ring comes to a complete stop.
C
friction between the ring and the ground is to the left.
D
there is no friction between the ring and the ground.
2
IIT-JEE 1998 Screening
MCQ (More than One Correct Answer)
+2
-0.5
A stone tied to a string of length L is whirled in a vertical circle with the other end of the string at the center. At a certain instant of time, the stone is at its lowest position, and has a speed u. The magnitude of the change in its velocity as it reaches a position where the string is horizontal is
A
$$\sqrt {{u^2} - 2gL}$$
B
$$\sqrt {2gL}$$
C
$$\sqrt {{u^2} - gL}$$
D
$$\sqrt {2\left( {{u^2} - gL} \right)}$$
3
IIT-JEE 1998 Screening
MCQ (More than One Correct Answer)
+2
-0.5
A force $$F = - K\left( {y\widehat i + x\widehat j} \right)$$ (where K is a positive constant) acts on a particle moving in the xy plane. Starting from the origin, the particle is taken along the positive x axis to the point $$\left( {a,0} \right)$$, and then parallel to the y axis to the point $$\left( {a,a} \right)$$. The total work done by the force F on the particle is
A
$$- 2K{a^2}$$
B
$$2K{a^2}$$
C
$$- K{a^2}$$
D
$$K{a^2}$$
4
IIT-JEE 1987
MCQ (More than One Correct Answer)
+2
-0.5
A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion of the particle takes place in a plane. It follows that :
A
Its velocity is constant
B
its acceleration is constant
C
its kinetic energy is constant
D
it moves in a circular path
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12