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Vivek Singh

Vivek Singh

HOD Physics @ Unacademy Bhilai

Former Director — Vibrant Academy | Former Faculty — Aakash Institute
In his free time, he provides career counseling on Dial Me 24/7

Hi, this is Vivek Singh. I help NEET and IIT-JEE aspirants do the one thing that matters most: get selected.

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JEE Mains NEET UG CBSE Class 11 CBSE Class 12 NCERT DC Pandey SL Arora
Is it easier to pull a block or to push it?||calculation of minimum force

Is it easier to pull a block or to push it?||calculation of minimum force

July 5, 2025

Description Frequently Asked Questions How to prepare for IIT-JEE Physics? To prepare for IIT-JEE Physics, focus on understanding concepts rather than memorizing formulas. Practice solving a variety of problems, especially previous years’ questions. Create a study schedule that covers all topics, with extra time for challenging areas like Mechanics and Electromagnetism. Regular revision and mock

NEET 2015:If vectors A = cosωt i +sinωt j and B = cos(ωt /2)i +sin(ωt/2) j are functions oftime, the

NEET 2015:If vectors A = cosωt i +sinωt j and B = cos(ωt /2)i +sin(ωt/2) j are functions oftime, the

July 3, 2025

Description A If vectors A = cosωt i +sinωt j and B = cos(ωt /2)i +sin(ωt/2) j are functions of time, then the value of t at which they are orthogonal to each other is A . t = π/w B. t = 0. C.t= π /4ω. D.t= π/2w Frequently Asked Questions How to prepare

NEET 2016:A particle moves so that its position vector is given by   r = cosωtx∧ + sinωty∧,where ω i

NEET 2016:A particle moves so that its position vector is given by r = cosωtx∧ + sinωty∧,where ω i

July 3, 2025

Description A particle moves so that its position vector is given by r = cosωtx∧ + sinωty∧,where ω is a constant. which of the following is true ? A. Velocity is perpendicular to →r and acceleration is directed towards the origin. B. Velocity is perpendicular to →r and acceleration is directed away from the origin

NEET 2016 :A particle moves so that its position vector is given by   r = cosωtx∧ + sinωty∧,where ω

NEET 2016 :A particle moves so that its position vector is given by r = cosωtx∧ + sinωty∧,where ω

July 3, 2025

Description A particle moves so that its position vector is given by r = cosωtx∧ + sinωty∧,where ω is a constant. which of the following is true ? A. Velocity is perpendicular to →r and acceleration is directed towards the origin. B. Velocity is perpendicular to →r and acceleration is directed away from the origin

NEET2017:If the magnitude of sum of two vectors is equal to the magnitude of difference of the two

NEET2017:If the magnitude of sum of two vectors is equal to the magnitude of difference of the two

July 1, 2025

Description 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 A. 45. B. 180°. C. 0. D. 90 Frequently Asked Questions How to prepare for NEET Physics? For NEET Physics preparation, focus on NCERT textbooks first, then move to

NEET 2017: The x and y coordinates of the particle at any time are x = 5t − 2t2 and y = 10t respecti

NEET 2017: The x and y coordinates of the particle at any time are x = 5t − 2t2 and y = 10t respecti

July 1, 2025

Description 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 meters and t in seconds. The acceleration of the particle at t = 2 s A. 5m ∕ s2 B. −4m ∕ s2 C. −8m ∕

NEET 2019:Two particles A and B are moving in uniform circular motion in concentric circles of radii

NEET 2019:Two particles A and B are moving in uniform circular motion in concentric circles of radii

July 1, 2025

Description Two particles A and B are moving in uniform circular motion in concentric circles of radii rA and rB with speed vA and vB respectively. Their time period of rotation is the same. The ratio of angular speed of A to that of B will be A. 1: 1 B.rA :rB. C.vA :vB D.rB

NEET 2019:When an object is shot from the bottom of a long smooth inclined planekept at an angle 60∘

NEET 2019:When an object is shot from the bottom of a long smooth inclined planekept at an angle 60∘

July 1, 2025

Description When an object is shot from the bottom of a long smooth inclined plane kept at an angle 60∘ with horizontal, it can travel a distance x1 along the plane. But when the inclination is decreased to 30∘ and the same object is shot with the same velocity, it can travel x2 distance. Then

NEET 2021:A particle moving in a circle of radius R with a uniform speed takes a time T to complete

NEET 2021:A particle moving in a circle of radius R with a uniform speed takes a time T to complete

July 1, 2025

Description A particle moving in a circle of radius R with a uniform speed takes a time T to complete one revolution. If this particle were projected with the same speed at an angle ‘ θ ‘ to the horizontal, the maximum height attained by it equals 4R. The angle of projection, θ, is then

NEET Re 2022 If F→ = 2i +j −k and r = 3i +2j −2k, then the scalar and vector products ofF→ and →r h

NEET Re 2022 If F→ = 2i +j −k and r = 3i +2j −2k, then the scalar and vector products ofF→ and →r h

July 1, 2025

Description If F→ = 2i +j −k and r = 3i +2j −2k, then the scalar and vector products of F→ and →r have the magnitudes respectively as: A. 10,2. B. 5, √3. C. 4, √5. D. 10, √2 Frequently Asked Questions How to prepare for NEET Physics? For NEET Physics preparation, focus on NCERT

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