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- Derivation of velocity in nth Bohr orbit • Physics Forums
The discussion focuses on deriving the expression for the electron's speed in the nth Bohr orbit, specifically addressing parts (a), (b), and (c) of a homework problem The key equations involved include the momentum equation mvr = hn 2π and the relationship between force and centripetal motion, m (v^2 r) = ke^2 r^2 The highest speed is confirmed to occur in the n = 1 orbit, with the speed
- 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 Some participants note that Newton proposed kinetic energy as proportional to
- Does a rotating accelerometer moving linearly measure linear velocity . . .
If you know the initial linear velocity and orientation, and keep track of the linear acceleration (accelerometer) and angular velocity (gyroscope), then you can calculate linear velocity by integration It's simple in theory, but tricky in practice, because small initial errors add up over time (drift)
- Calculating Final Velocity on a Ramp - Physics Forums
The original poster outlines a method for calculating theoretical acceleration and velocity based on measurements of distance, time, and mass Some participants suggest alternative methods, including using angles and friction considerations
- Numerade
Confusing speed with velocity, neglecting the directional component of velocity Overlooking that deceleration is still a form of acceleration (negative acceleration) Failing to correctly apply the vector nature of velocity and acceleration in problem-solving
- Why Does a Car Move at Constant Velocity Despite Equal Opposing Forces . . .
The discussion remains unresolved regarding the initial confusion about the relationship between force, acceleration, and velocity Participants reference Newton's laws, but there are varying interpretations of how these laws apply to the scenario of a car moving at constant velocity against opposing forces
- Exit velocity through a nozzle: Bernoulli vs. Experience
The discussion revolves around the exit velocity of fluid through a nozzle, comparing theoretical predictions from Bernoulli's equation with real-world experiences Participants explore the implications of nozzle diameter on exit speed, considering factors such as friction losses and flow conditions One participant states that according to Bernoulli's equation, the exit speed of fluid is
- Torque Power: Understanding Angular Velocity - Physics Forums
The discussion revolves around the relationship between torque, power, and angular velocity, particularly in the context of rotating systems Participants explore how torque can exist in systems with constant angular velocity and the implications of this on the understanding of power and friction
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