Question of the day

Block falls on spring

Q- A small light disc is attached with one end of a spring of constant K, the other end is fixed to ground and stands vertical. a small block of mass m is dropped from a height h above the disc. Considering elastic impact and only vertical motion find the maximum velocity and maximum acceleration of...

December 08,2025 11:57 AM - Comment(s)
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Ray Optics: Refraction of light

The virtual depth of the fish in water.
November 23,2025 07:29 AM - Comment(s)
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Electrostatics: Capacitance

A spherical capacitor has two different layers of dielectrics between its plates. Their permittivity are ϵ1 for a < r < r0 and ϵ2 for r0 < r < b. Find the capacitance of this system by finding the total energy of the fields between the plates.

Solution:

October 29,2025 07:32 AM - Comment(s)
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Kinematics: Variable acceleration

Q- At t = 0, car A starts from rest at point 1. It moves with an acceleration of 0.4 t m/s^2. At the same time, car B starts from point 2, which is 225 m ahead, with a constant acceleration of 2 m/s^2 in the same direction. Find: 

(a) Speed of car A at the end of the 225 m section. 

(b)...

October 08,2025 11:19 PM - Comment(s)
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