1
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Change Language
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 24 English
A
3mg
B
6mg
C
zero
D
2mg
2
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Change Language
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
Change Language
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 72 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
Change Language
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