1
NDA General Ability 16 April 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language
A sphere of volume V is made of a material with lower density than water. While on Earth, it floats on water with its volume f1V (f1 < 1) submerged. On the other hand, on a spaceship accelerating with acceleration a < g (g is the acceleration due to gravity on Earth) in outer space, its submerged volume in water is f2V. Then:
A
f2 = f1
B
f2 = (1 - $\frac{a}{g}$) f1
C
f2 > f1
D
f2 = $\frac{a}{g}$ f1
2
NDA General Ability 16 April 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language

Two identical containers X and Y are connected at the bottom by a thin tube of negligible volume. The tube has a valve in it, as shown in the figure. Initially container X has a liquid filled up to height h in it and container Y is empty. When the valve is opened, both containers have equal amount of liquid in equilibrium. If the initial (before the valve is opened) potential energy of the liquid is P1 and the final potential energy is P2 then :

NDA General Ability 16 April 2023 General Science - Physics Question 121 English

A
P1 = P2
B
P1 = 4P2
C
P1 = 2P2
D
P1 = 8P2
3
NDA General Ability 16 April 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language
A particle is moving in a circle of radius R with a constant speed v. Its average acceleration over the time when it moves over half the circle is :
A
$\frac{v^2}{R} $
B
$\frac{\pi v^2}{2R}$
C
$\frac{2v^2}{\pi R}$
D
0
4
NDA General Ability 16 April 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Two forces of 5⋅0 N each are acting on a point mass. If the angle between the forces is 60°, then the net force acting on the point mass has magnitude close to :
A
8⋅6 N
B
4⋅3 N
C
50 N
D
6⋅7 N
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