1
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

Four spheres each of diameter $$2 a$$ and mass $$m$$ are placed in a way that their centers lie on the four corners of a square of side $$b$$. Moment of inertia of the system about an axis along one of the sides of the square is

A
$$\frac{8}{5} m a^2$$
B
$$\frac{4}{5} m a^2+5 m b^2$$
C
$$\frac{4}{5} m a^2+2 m b^2$$
D
$$\frac{8}{5} m a^2+2 m b^2$$
2
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

If an energy of 684 J is needed to increase the speed of a flywheel from 180 rpm to 360 rpm, then find its moment of inertia.

A
0.7 kg/m$$^2$$
B
1.28 kg/m$$^2$$
C
2.75 kg/m$$^2$$
D
7.28 kg/m$$^2$$
3
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

A particle executing simple harmonic motion along a straight line with an amplitude A, attains maximum potential energy when its displacement from mean position equals

A
0
B
$$\pm \frac{A}{\sqrt2}$$
C
$$\pm A$$
D
$$\pm \frac{A}{2}$$
4
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

The bob of a simple pendulum is a spherical hollow ball filled with water. A plugged hole near the bottom of the oscillating bob gets suddenly unplugged. During observation, till water is coming out the time period of oscillation would

A
remain unchanged
B
increase towards a saturation value
C
first increase and then decrease to the original value
D
first decrease and then increase to the original value
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