NEET 2020 Phase 1 | Rotational Motion Question 13 | Physics

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

NEET 2019

MCQ (Single Correct Answer)

-1

Two particles A and B are moving in uniform circular motion in concentric circles of radii r_A and r_B with speed v_A and v_B respecitively. Their time period of rotation is the same. The ratio of angular speed of A to that of B will be :

v_A : v_B

1 : 1

r_B : r_A

r_A : r_B

NEET 2019

MCQ (Single Correct Answer)

-1

A disc of radius 2 m and mass 100 kg rolls on a horizontal floor. Its centre of mass has speed of 20 cm/s. How much work is needed to stop it?

1 J

2 J

3 J

30 kJ

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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