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Canada-0-PIPE ไดเรกทอรีที่ บริษัท
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ข่าว บริษัท :
- Escape Velocity Question: Why is the final kinetic energy = 0?
The discussion revolves around the concept of escape velocity, specifically addressing why the final kinetic energy of an object is considered to be zero when it reaches an infinite distance from a gravitational body Participants explore the implications of this idea on the object's velocity and its interaction with gravity at large distances
- Conservation of kinetic energy in expanding space
The discussion revolves around the conservation of kinetic energy in the context of an expanding and contracting universe Participants explore how the expansion of space affects the kinetic energy of objects moving at constant velocity and consider the implications for energy conservation laws in cosmological settings Some participants assert that in an expanding universe, objects moving at
- Why Does Doubling Velocity Increase Kinetic Energy by Four Times?
The discussion centers on the relationship between velocity and kinetic energy, specifically why doubling the velocity of an object results in a fourfold increase in kinetic energy Participants explore this concept through examples and hypothetical scenarios, addressing both theoretical and practical implications in physics One participant expresses confusion about the kinetic energy formula
- Why is kinetic energy 1 2 mv^2? - Physics Forums
Kinetic energy is a defined quantity, so we certainly could have chosen to define it with a factor of 1 instead of 1 2 However, we want kinetic energy to have the property that the change in KE is equal to the work done
- Why is kinetic energy not a vector - Physics Forums
Others emphasize that kinetic energy is defined as the work required to move a stationary particle to a certain speed, clarifying that the equation involves speed (a scalar) rather than velocity (a vector) One participant points out that kinetic energy is a magnitude, contrasting it with momentum, which is a vector quantity
- How is momentum conserved if you lose kinetic energy?
The energy component of KE is the velocity Momentum is mass x velocity so, in a collision containing in-elasticity, if KE is lost to heat then that heat energy must have been supplied by the velocity of the object And since velocity has been lost to supply the heat then the overall momentum
- Why is velocity squared in the equation for kinetic energy?
The discussion centers around the question of why kinetic energy is proportional to the square of velocity in the equation for kinetic energy Participants explore historical perspectives, mathematical reasoning, and the implications of this relationship in physics, touching on theoretical and conceptual aspects
- Can an object have both potential and kinetic energy?
A later reply highlights the practical application of managing potential and kinetic energy in aviation, emphasizing the importance of energy trade-offs during flight maneuvers Participants generally agree that an object can have both potential and kinetic energy at the same time, although there are varying examples and contexts discussed
- How is the formula Kinetic Energy=1 2mv^2 derived?
The discussion centers around the derivation of the kinetic energy formula, \ ( KE = \frac {1} {2}mv^2 \) Participants explore various methods of deriving this formula, including kinematic equations, the work-energy theorem, and the relationship between force and power The scope includes theoretical derivations and conceptual clarifications
- Understanding Recoil Kinetic Energy in Atomic Emission: Fact or Fiction?
The discussion revolves around the recoil kinetic energy of an atom following the emission of a photon, exploring the validity and derivation of a specific formula related to this phenomenon Participants examine the underlying principles, including conservation of energy and momentum, and draw analogies to familiar concepts like gun recoil
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