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Is velocity ever a scalar quantity? - Physics Forums I thought velocity was always a vector quantity, one with both magnitude and direction When it came to the suvat equations, where v = final velocity, and u = initial velocity, I thought both of those were vector quantities, e g; v (final velocity) 112km hr North u (initial velocity) 0km hr
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
What is the derivation for the drag force equation used in Terminal . . . The drag force equation used in terminal velocity, expressed as F_drag = 1 2 * C_D * A * ρ * v^2, is fundamentally a definition rather than a derivation The drag coefficient (C_D) is determined experimentally and varies based on the object's geometry and flow conditions While the equation provides a rough approximation for turbulent flows, it is essential to understand that the drag
Diving Board Jump: Analyzing Velocity and Height - Physics Forums The discussion centers on the physics problem of a diver jumping from a 3 00-meter high diving board with an initial upward velocity of 1 75 m s The diver's velocity upon reaching the water is calculated to be 7 87 m s, using the equation V^2 = Vo^2 + 2ad Additionally, the maximum height reached above the water is determined to be 3 3125 meters, combining the height of the jump with the
Change in direction affecting velocity • Physics Forums Changing direction while in motion does affect velocity, as velocity is a vector quantity that includes both speed and direction When an object, such as a weight swung in a circle, changes direction, it experiences acceleration due to the centripetal force acting on it, even if its speed remains constant The distinction between acceleration and deceleration is crucial; in physics, any change
Orbital Velocity: Why Mass Doesnt Matter • Physics Forums The discussion centers on the independence of orbital velocity from mass, specifically in the context of satellites The centripetal force equation, m2v2 r = GM1m2 r2, illustrates that when one mass (m2) is significantly smaller than the other (M1), the mass cancels out, leading to a consistent orbital velocity However, larger masses, such as the Moon, do exhibit differences in orbital speed
Induced Drag Airfoil: Proportional to Velocity^2? - Physics Forums The discussion centers on the relationship between induced drag and velocity in airfoils, specifically addressing the claim that induced drag is inversely proportional to the square of airspeed The formula for induced drag, Induced Drag = 0 5 * Density * Velocity² * Wing Area * Induced Drag Coefficient, indicates a direct proportionality to velocity² The coefficient of induced drag, CDi
Centrifugal Compressor: Absolute Velocity Calculation The discussion centers on calculating the absolute velocity of air at the outlet of a centrifugal compressor using the impeller diameter, RPM, and slip factor Key concepts include the slip factor, which is the ratio of ideal whirl velocity to actual whirl velocity, and the importance of velocity triangles in analyzing airflow around impeller vanes The absolute flow angle and radial component
Calculating Final Velocity Using Force-Displacement Graph The discussion focuses on calculating the final velocity of a 9 9 kg object using a Force vs Displacement graph, given an initial velocity of 28 6 m s The key equations utilized are W = Fd for work and KE = 1 2mv (final)^2 - 1 2mv (initial)^2 for kinetic energy Participants concluded that the work done can be determined by calculating the area under the graph, which consists of a rectangle
Calculating Trebuchet Velocity: A Homework Help Guide The discussion focuses on calculating the velocity of a golf ball launched by a trebuchet for a physics project The user provided specific parameters including a counterweight mass of 10 937 kg and a height of 0 631 m, leading to an average distance of 34 33 m The user initially calculated a velocity of 3 53 m s, which was deemed incorrect After revising the calculations using the energy