1
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
A particle moves from a point $$\left( { - 2\widehat i + 5\widehat j} \right)$$ to $$\left( {4\widehat j + 3\widehat k} \right)$$ when a force of $$\left( {4\widehat i + 3\widehat j} \right)$$ N is applied. How much work has been done by the force ?
A
8 J
B
11 J
C
5 J
D
2 J
2
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
Two rotating bodies A and B of masses m and 2m with moments of inertia $${I_A}$$ and $${I_B}$$ ($${I_B}$$ > $${I_A}$$) have equal kinetic energy of rotation. If LA and LB be their angular momenta respectively, then
A
$${L_A} = {{{L_B}} \over 2}$$
B
$${L_A} = 2{L_B}$$
C
$${L_B} > {L_A}$$
D
$${L_A} > {L_B}$$
3
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
A solid sphere of mass m and radius R is rotating about its diameter. A solid cylinder of same mass and same radius is also rotating about its geometrical axis with an angular speed twice that of the sphere. The ratio of their kinetic energies of rotation (Esphere / Ecylinder) will be
A
2 : 3
B
1 : 5
C
1 : 4
D
3 : 1
4
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
A light rod of length $$l$$ has two masses m1 and m2 attached to its two ends. The moment of inertia of the system about an axis perpendicular to the rod and passing through the centre of mass is
A
$${{{m_1}{m_2}} \over {{m_1} + {m_2}}}{l^2}$$
B
$${{{m_1} + {m_2}} \over {{m_1}{m_2}}}{l^2}$$
C
$$\left( {{m_1} + {m_2}} \right){l^2}$$
D
$$\sqrt {{m_1}{m_2}} \,{l^2}$$
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