NEET 2021 | Rotational Motion Question 7 | Physics

NEET 2021

MCQ (Single Correct Answer)

-1

From a circular ring of mass 'M' and radius 'R' an arc corresponding to a 90$$^\circ$$ sector is removed. The moment of inertia of the remaining part of the ring about an axis passing through the center of the ring and perpendicular to the plane of the ring is 'K' times 'MR²'. Then the value of 'K' is :

$${1 \over 8}$$

$${3 \over 4}$$

$${7 \over 8}$$

$${1 \over 4}$$

NEET 2021

MCQ (Single Correct Answer)

-1

A uniform rod of length 200 cm and mass 500 g is balanced on a wedge placed at 40 cm mark. A mass of 2 kg is suspended from the rod at 20 cm and another unknown mass 'm' is suspended from the rod at 160 cm mark as shown in the figure. Find the value of 'm' such that the rod is in equilibrium. (g = 10 m/s²)

NEET 2021 Physics - Rotational Motion Question 8 English

NEET 2021 Physics - Rotational Motion Question 8 English

$${1 \over {12}}$$kg

$${1 \over {2}}$$kg

$${1 \over {3}}$$kg

$${1 \over {6}}$$kg

NEET 2020 Phase 1

MCQ (Single Correct Answer)

-1

Find the torque about the origin when a force of 3 $$\hat j$$ N acts on a particle whose position vector is 2 $$\hat k$$ m.

6 $$\hat j$$ N m

$$ - $$ 6 $$\hat i$$ N m

6 $$\hat k$$ N m

6 $$\hat i$$ N m

NEET 2019

MCQ (Single Correct Answer)

-1

A solid cylinder of mass 2 kg and radius 4 cm is rotating about its axis at the rate of 3 rpm. The torque required to stop after 2$$\pi $$ revolutions is :

2 × 10^–3 N m

2 × 10^–6 N m

2 × 10⁶ N m

12 × 10^–4 N m

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Human Health and Diseases Body Fluids and Its Circulation Locomotion and Movement Neural Control and Coordination Reproduction in Organisms Reproductive Health Structural Organisation in Animals Digestion and Absorption Excretory Products and Their Elimination Chemical Coordination and Integration Human Reproduction Animal Kingdom Breathing and Exchange of Gases Evolution