1
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Three blocks with masses m, 2m and 3m are connected by strings, as shown in the figure. After an upward force F is applied on block m, the masses move upwards at constant speed v. What is the net force on the block of mass 2m ? (g is the acceleration due to gravity)
NEET 2013 Physics - Laws of Motion Question 18 English
A
3mg
B
6mg
C
zero
D
2mg
2
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
3
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
4
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 63 English
A
$${{2g} \over L}$$
B
$${{2g} \over {2L}}$$
C
$${{3g} \over {2L}}$$
D
$${g \over L}$$
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