CRACKNEETPhysics

A pendulum bob of mass 'm' is released from a height 'h'. At the bottom of its swing, it makes a perfectly elastic collision with a stationary block of mass '2m' placed on a frictionless surface.

To what maximum height does the bob rebound after the collision?

(1) h

(2) h/3

(3) h/9

(4) h/4

Free Study Notes :- open.substack.com/pub/crackneetphysics/p/study-not…

Watch Answer Video Here : youtube.com/post/UgkxVBqb-p0pjOMgp-kpNSQF4x3zJT-cP…

13 hours ago | [YT] | 2

CRACKNEETPhysics

Three identical masses (M) are placed at the vertices of an equilateral triangle. What is the net Gravitational Field Intensity at the centroid of the triangle?

A) 3GM / R²

B) Zero

C) GM / R²

D) √3 GM / R²


Solution and Study Material on Gravitation open.substack.com/pub/crackneetphysics/p/mastering…

14 hours ago | [YT] | 2

CRACKNEETPhysics

Assertion (A): The magnitude of Average Velocity for the entire journey is strictly less than the Average Speed.

Reason (R): The body reverses its direction of motion (from East to West), which causes the magnitude of Net Displacement to be less than the Total Distance covered.

Options:

1. Both A and R are true and R is the correct explanation of A.

2. Both A and R are true but R is NOT the correct explanation of A.

3. A is true but R is false.

4. A is false but R is true.

16 hours ago | [YT] | 1

CRACKNEETPhysics

A particle moves along the x-axis such that its position is given by the equation x(t) = bt² - ct³, where b = 2.40 m/s² and c = 0.120 m/s³.

What is the average velocity of the particle between t = 0 and t = 10.0 seconds?

Options:

A. 24 m/s

B 12 m/s

C 0 m/s

D. 8.4 m/s

17 hours ago | [YT] | 1

CRACKNEETPhysics

NEET 2023 Physics Question

A football player is moving southward and suddenly turns eastward with the same speed to avoid an opponent. The force that acts on the player while turning is:


A along south-west

B along eastward

C along northward

D along north-east

18 hours ago | [YT] | 1

CRACKNEETPhysics

NEET 2023 Physics Question

A vehicle travels half the distance with speed v and the remaining distance with speed 2v. Its average speed is:


1. 3v/4

2. v/3

3. 2v/3

4. 4v/3

18 hours ago | [YT] | 2

CRACKNEETPhysics

Consider the following Assertion and Reason related to the electric field of a dipole:

Assertion: The electric field produced by a dipole is identical in magnitude and direction along both the x-axis and the equatorial plane.

Reason: A dipole does not have any specific orientation and its electric field is uniform in all directions around it.

Which of the following is correct?

a) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
b) Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
c) Assertion is true, but Reason is false.
d) Both Assertion and Reason are false.

Watch this Video :- https://youtu.be/wIAa3zV4ei4

https://youtu.be/oVpRSXSknO0?si=IHGv7...

18 hours ago | [YT] | 0

CRACKNEETPhysics

NEET 2023 Question

An electric dipole is placed at an angle of 30° with an electric field of intensity 2 × 10⁵ NC⁻¹. It experiences a torque equal to 4 N·m. If the dipole length is 2 cm, calculate the magnitude of the charge on the dipole.


Options:

1. 2 mC

2. 8 mC

3. 6 mC

4. 4 mC

18 hours ago | [YT] | 0

CRACKNEETPhysics

NEET 2023 Question

The displacement-time (x-t) graph of a particle performing simple harmonic motion is shown in the figure. The acceleration of the particle at t = 2 s is:

− π²/16 ms⁻²

π²/8 ms⁻²

− π²/8 ms⁻²

π²/16 ms⁻²

Hint :- a=−ω^2 x

Watch this Simple Harmonic Question for upcoming NEET https://youtu.be/WNmWZ1JWBxM

1 day ago | [YT] | 5

CRACKNEETPhysics

NEET 2023 QUESTION

In hydrogen spectrum, the shortest wavelength in the Balmer series is λ. The shortest wavelength in the Bracket series is:


A ) 16λ

B) 2λ

C) 4λ

D) 9λ

revise spectral series youtube.com/live/eZOhtU1wkRg?si=hz4OiGpSIPmXWHHl

1 day ago | [YT] | 2