NEET 2017 | Motion in a Plane Question 13 | Physics

The x and y coordinates of the particle at any time are x = 5t $$-$$ 2t² and y = 10t respectively, where x and y are in metres and t in seconds. The acceleration of the particle at t = 2 s is

5 m s^$$-$$2

$$-$$4 m s^$$-$$2

$$-$$8 m s^$$-$$2

NEET 2016 Phase 2

MCQ (Single Correct Answer)

-1

In the given figure, a = 15 m s^$$-$$2 represents the total acceleration of particle moving in the clockwise direction in a circle of radius R = 2.5 m at a given instant of time. The speed of the particle is

NEET 2016 Phase 2 Physics - Motion in a Plane Question 15 English

NEET 2016 Phase 2 Physics - Motion in a Plane Question 15 English

4.5 m s^$$-$$1

5.0 m s^$$-$$1

5.7 m s^$$-$$1

6.2 m s^$$-$$1

NEET 2016 Phase 1

MCQ (Single Correct Answer)

-1

If the magnitude of sum of two vectors is equal to the magnitude of difference of the two vectors, the angle between these vectors is

45^o

180^o

0^o

90^o

NEET 2016 Phase 1

MCQ (Single Correct Answer)

-1

A particle moves so that its position vector is given by $$\overrightarrow r = \cos \omega t\,\widehat x + \sin \,\omega t\,\widehat y,$$ where $$\omega $$ is a constant.

Which of the following is true?

Velocity is perpendicular to $$\overrightarrow r $$ and acceleration is directed towards the origin.

Velocity is perpendicular to $$\overrightarrow r $$ and acceleration is directed away from the origin.

Velocity and acceleration both are perpendicular to $$\overrightarrow r $$

Velocity and acceleration both are parallel to $$\overrightarrow r $$

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NEET Subjects

Biology

Zoology

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