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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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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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A uniform disc is rotating with angular velocity 𝜔 . If its mass is doubled and radius is halved, what happens to its moment of inertia about its axis?
Moment of inertia of a disc about its axis is 𝐼 = 1/2𝑀𝑅². When M is doubled and R is halved, I = 1/2.2M.(R/2)² = 1/2MR². 1/2 = 1/2 Iᵢₙᵢₜᵢₐₗ. 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 undersRead more
Moment of inertia of a disc about its axis is 𝐼 = 1/2𝑀𝑅². When M is doubled and R is halved, I = 1/2.2M.(R/2)² = 1/2MR². 1/2 = 1/2 Iᵢₙᵢₜᵢₐₗ.
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 bullet hits gets embedded in a solid block resting on a frictionless surface. In this process which one of the following is correct?
When a bullet strikes and penetrates into a solid block placed on a frictionless surface, the process it goes through will be that which emphasizes important principles of conservation of momentum and energy. Here, the system is the bullet and the block, assumed to be isolated from all external forcRead more
When a bullet strikes and penetrates into a solid block placed on a frictionless surface, the process it goes through will be that which emphasizes important principles of conservation of momentum and energy. Here, the system is the bullet and the block, assumed to be isolated from all external forces acting in the horizontal direction. Therefore, the total momentum of the system at the beginning is equal to the total momentum of the system after the collision; thus, the momentum is conserved.
However, it is significant to note that kinetic energy is not conserved in this process. The collision between the bullet and the block is an example of an inelastic collision, in which the two objects stick together after impact. During this interaction, part of the bullet’s kinetic energy is transformed into other forms of energy such as heat and sound. Because of this, whereas the system’s momentum remains invariant during the collision, the kinetic energy is reduced.
In summary, when the bullet is embedded in the block, only momentum is conserved, while kinetic energy is lost in the process. This illustrates the fundamental differences between momentum and kinetic energy conservation in collision events.
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A parallel beam of monochromatic light falls normally on a single narrow slit. How does the angular width of the principal maximum in the resulting diffraction pattern depend on width of the slit?
The angular width of the principal maximum in a single-slit diffraction pattern is inversely proportional to the slit width. As the slit width decreases, the angular width increases, spreading the diffraction pattern more widely on the screen. For more visit here: https://www.tiwariacademy.com/ncertRead more
The angular width of the principal maximum in a single-slit diffraction pattern is inversely proportional to the slit width. As the slit width decreases, the angular width increases, spreading the diffraction pattern more widely on the screen.
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