1
NEET 2018
MCQ (Single Correct Answer)
+4
-1
Change Language
A body initially at rest and sliding along a frictionless track from a height h (as shown in the figure) just completes a vertical circle of diameter AB = D. The height h is equal to NEET 2018 Physics - Work, Energy and Power Question 11 English
A
D
B
$${3 \over 2}D$$
C
$${7 \over 5}D$$
D
$${5 \over 4}D$$
2
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
3
NEET 2018
MCQ (Single Correct Answer)
+4
-1
Change Language
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
4
NEET 2018
MCQ (Single Correct Answer)
+4
-1
Change Language
The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is
A
26.8%
B
20%
C
6.25%
D
12.5%
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