1
NEET 2018
+4
-1
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
+4
-1
A solid sphere is rotating freely about its symmetry axis in free space. The radius of the sphere is increased keeping its mass same. Which of the following physical quantities would remain constant for the sphere?
A
Angular velocity
B
Moment of inertia
C
Rotational kinetic energy
D
Angular momentum
3
NEET 2018
+4
-1
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 2018
+4
-1
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
$$- 7\widehat i - 4\widehat j - 8\widehat k$$
EXAM MAP
Medical
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