1
NEET 2013
MCQ (Single Correct Answer)
+4
-1
A uniform force of $$\left( {3\widehat i + \widehat j} \right)$$ newton acts on a particle of mass 2 kg. Hence the particle is displaced from position $$\left( {2\widehat i + \widehat k} \right)$$ metre to position $$\left( {4\widehat i + 3\widehat j - \widehat k} \right)$$ metre. The work done by the force on the particle is
A
13 J
B
15 J
C
9 J
D
6 J
2
NEET 2013
MCQ (Single Correct Answer)
+4
-1
A small object of uniform density rolls up a curved surface with an initial velocity 'v'. It reaches upto a maximum height of $${{3{v^2}} \over {4g}}$$ with respect to the initial position. The object is
A
hollow sphere
B
disc
C
ring
D
solid sphere
3
NEET 2013
MCQ (Single Correct Answer)
+4
-1
A rod PQ of mass M and length L is hinged at end P. The rod is kept horizontal by a massless string tied to point Q as shown in figure. When string is cut, the initial angular acceleration of the rod is

NEET 2013 Physics - Rotational Motion Question 67 English
A
$${{2g} \over L}$$
B
$${{2g} \over {2L}}$$
C
$${{3g} \over {2L}}$$
D
$${g \over L}$$
4
NEET 2013
MCQ (Single Correct Answer)
+4
-1
A body of mass 'm' is taken from the earth's surface to the height equal to twice the radius (R) of the earth. The change in potential energy of body will be
A
3mgR
B
$${1 \over 3}$$mgR
C
mg2R
D
$${2 \over 3}$$ mgR
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