1
NEET 2018
MCQ (Single Correct Answer)
+4
-1
Change Language
A solid sphere is in rolling motion. In rolling motion a body possesses translational kinetic energy (Kt) as well as rotational kinetic energy (Kr) simultaneously. The ratio Kt : (Kt + Kr) for the sphere is
A
7 : 10
B
5 : 7
C
10 : 7
D
2 : 5
2
NEET 2018
MCQ (Single Correct Answer)
+4
-1
Change Language
The moment of the force, $$\overrightarrow F = 4\widehat i + 5\widehat j - 6\widehat k$$ at
(2, 0, –3), about the point (2, –2, –2), is given by
A
$$ - 8\widehat i - 4\widehat j - 7\widehat k$$
B
$$ - 4\widehat i - \widehat j - 8\widehat k$$
C
$$ - 7\widehat i - 8\widehat j - 4\widehat k$$
D
$$ - 7\widehat i - 4\widehat j - 8\widehat k$$
3
NEET 2018
MCQ (Single Correct Answer)
+4
-1
Change Language
Three objects, A : (a solid sphere), B : (a thin circular disk) and C : (a circular ring), each have the same mass M and radius R. They all spin with the same angular speed $$\omega $$ about their own symmetry axes. The amounts of work (W) required to bring them to rest, would satisfy the relation
A
WC > WB > WA
B
WA > WB > WC
C
WB > WA > WC
D
WA > WC > WB
4
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Change Language
A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N?
A
0.25 rad s$$-$$2
B
25 rad s$$-$$2
C
5 m s$$-$$2
D
25 m s$$-$$2

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