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Which physical quantity remains conserved in pure rolling motion?
In pure rolling, angular momentum remains conserved as there is no slipping, and external torques (other than due to friction) are negligible. This question related to Chapter 6 physics Class 11th NCERT. From the Chapter 6 System of Particles and Rotational Motion. Give answer according to your undeRead more
In pure rolling, angular momentum remains conserved as there is no slipping, and external torques (other than due to friction) are negligible.
This question related to Chapter 6 physics Class 11th NCERT. From the Chapter 6 System of Particles and Rotational Motion. Give answer according to your understanding.
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See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-6/
Kinetic energy, with any refrence, must be
Kinetic energy is a concept in physics that describes the energy an object has due to its motion. Kinetic energy must always be a positive quantity or zero. When an object is at rest, its kinetic energy is zero because there is no motion. However, once the object starts to move, its kinetic energy bRead more
Kinetic energy is a concept in physics that describes the energy an object has due to its motion. Kinetic energy must always be a positive quantity or zero. When an object is at rest, its kinetic energy is zero because there is no motion. However, once the object starts to move, its kinetic energy becomes positive. This positive nature of kinetic energy arises from the fact that it is the product of both the mass of the object and the square of its velocity. Thus, given that the velocity increases, so is the kinetic energy, which only represents the increase in capability to do work due to motion. Such a nature in kinetic energy serves well in many applications within mechanics, engineering, and other aspects, even in understanding natural phenomena.
For instance, when vehicles accelerate, they acquire kinetic energy, which is critical in determining their stopping distances and general safety. To put it briefly, kinetic energy is inherently a positive quantity that signifies the energy of motion, reflecting the dynamic behavior of objects in various physical contexts. Understanding kinetic energy is very important for the analysis of motion and the prediction of the behavior of moving bodies in different scenarios.
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State the principle on which the working of an optical fibre is based.
The working of an optical fiber is based on the principle of total internal reflection. When light enters the fiber at a certain angle, it is continuously reflected inside the core due to the difference in refractive indices between the core and the cladding. This allows light to travel long distancRead more
The working of an optical fiber is based on the principle of total internal reflection. When light enters the fiber at a certain angle, it is continuously reflected inside the core due to the difference in refractive indices between the core and the cladding. This allows light to travel long distances with minimal loss, even around bends.
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What is the dimension of torque?
Torque is given by 𝜏 = 𝑟 × 𝐹, where 𝑟 is the distance (L) and 𝐹 = 𝑚𝑎 (MLT ⁻²). Thus. the dimension of τ is ML² T ⁻² . This question related to Chapter 6 physics Class 11th NCERT. From the Chapter 6 System of Particles and Rotational Motion. Give answer according to your understanding. For more pleasRead more
Torque is given by 𝜏 = 𝑟 × 𝐹, where 𝑟 is the distance (L) and 𝐹 = 𝑚𝑎 (MLT ⁻²). Thus. the dimension of τ is ML² T ⁻² .
This question related to Chapter 6 physics Class 11th NCERT. From the Chapter 6 System of Particles and Rotational Motion. Give answer according to your understanding.
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See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-6/
A boy carrying a box on his head is walking on a level load from one place to another on a straight road is doing no work.
The upward force on the box that maintains it in its position when the boy walks on a horizontal level road is provided by the boy himself. The horizontal displacement takes place when the boy walks forward. In physics, work is the product of the force applied in the direction of the displacement. FRead more
The upward force on the box that maintains it in its position when the boy walks on a horizontal level road is provided by the boy himself. The horizontal displacement takes place when the boy walks forward. In physics, work is the product of the force applied in the direction of the displacement. For work to be done, a component of the force must exist in the direction of movement. In this case, the force exerted by the boy on the box is vertical, while his movement is horizontal. Since these two directions are perpendicular to each other, the work done on the box is considered zero. It is important to note that although the boy may feel fatigued from carrying the box, this is not an indication of work being done in the physics sense.
Thus, although the boy exerts himself to keep the box in its place, he is doing no work on the box during the walk. This example represents a simple idea in physics: the difference between the colloquial use of the word “work” and its technical definition in science. To summarize, if the boy is carrying a box, he is doing no work on the box.
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