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This question examines the relationship between centripetal force and radius.
Centripetal force is 𝐹𝑐 =𝑚𝜔²𝑟. If 𝑟 is doubled, 𝐹𝑐 ∝ 𝑟, so the force becomes four times. 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 please visit here: https://www.tiwRead more
Centripetal force is 𝐹𝑐 =𝑚𝜔²𝑟. If 𝑟 is doubled, 𝐹𝑐 ∝ 𝑟, so the force becomes four times. 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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A body of mass 5 kg has momentum of 10 kg m s⁻¹. When a force of 0.2 N is applied on it for 10 s, what is the change in kinetic energy?
To find the change in kinetic energy of a body that has a mass of 5 kg and an initial momentum of 10 kg·m/s, we begin by finding the initial velocity. The definition of momentum as the product of mass and velocity reveals that the initial velocity is 2 m/s when calculated using the given mass and moRead more
To find the change in kinetic energy of a body that has a mass of 5 kg and an initial momentum of 10 kg·m/s, we begin by finding the initial velocity. The definition of momentum as the product of mass and velocity reveals that the initial velocity is 2 m/s when calculated using the given mass and momentum.
Next, we must know what the applied force does. For 10 s, a force of 0.2 N acts on the body. According to Newton’s second law, this will give an acceleration produced. Since we have the mass known, the computed acceleration is found to be 0.04 m/s².
Now, we could calculate the final velocity after a force has been applied. Acceleration increases this initial velocity of 2 m/s to a final velocity of 2.4 m/s.
We calculate the initial and final kinetic energies in order to determine the change in kinetic energy. The initial kinetic energy is 10 J, whereas the final kinetic energy, once the increase in velocity is considered, is 14.4 J. So, the change in kinetic energy is 4.4 J.
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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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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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