1
KCET 2023
MCQ (Single Correct Answer)
+1
-0

Seven identical discs are arranged in a planar pattern, so as to touch each other as shown in the figure. Each disc has mass $$m$$ radius $$R$$. What is the moment of inertia of system of six discs about an axis passing through the centre of central disc and normal to plane of all discs?

KCET 2023 Physics - Rotational Motion Question 10 English

A
$$27 ~m R^2$$
B
$$100 ~m R^2$$
C
$$55 \frac{m R^2}{2}$$
D
$$85 \frac{m R^2}{2}$$
2
KCET 2022
MCQ (Single Correct Answer)
+1
-0

The angular speed of a motor wheel is increased from $$1200 \mathrm{~rpm}$$ to $$3120 \mathrm{~rpm}$$ in $$16 \mathrm{~s}$$. The angular acceleration of the motor wheel is

A
$$4 \pi \mathrm{~rad} / \mathrm{s}^2$$
B
$$6 \pi \mathrm{~rad} / \mathrm{s}^2$$
C
$$8 \pi \mathrm{~rad} / \mathrm{s}^2$$
D
$$2 \pi \mathrm{~rad} / \mathrm{s}^2$$
3
KCET 2021
MCQ (Single Correct Answer)
+1
-0

In figure $$E$$ and $$v_{\mathrm{cm}}$$ represent the total energy and speed of centre of mass of an object of mass $$1 \mathrm{~kg}$$ in pure rolling. The object is

KCET 2021 Physics - Rotational Motion Question 8 English

A
sphere
B
ring
C
disc
D
hollow cylinder
4
KCET 2020
MCQ (Single Correct Answer)
+1
-0

A wheel starting from rest gains an angular velocity of $$10 \mathrm{~rad} / \mathrm{s}$$ after uniformly accelerated for $$5 \mathrm{~s}$$. The total angle through which it has turned is

A
$$25 \mathrm{~rad}$$
B
$$100 \mathrm{~rad}$$
C
$$25 \pi \mathrm{~rad}$$
D
$$50 \pi \mathrm{~rad}$$ and a vertical axis
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