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Average Speed vs. Velocity: Explained - Physics Forums The discussion clarifies the distinction between average speed and average velocity, emphasizing that average speed is defined as total distance divided by total time, while average velocity is defined as displacement divided by time It is established that average speed is always greater than or equal to the magnitude of average velocity, particularly in cases involving changes in direction
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
Calculating Nozzle Flow Rate - Physics Forums Calculating Nozzle Flow Rate To work out the flow rate of water from a nozzle we need to work out the volume in a given period of time To do this we work out the area of the nozzle and then multiply it by the velocity of the water coming from the nozzle to give us volume per unit of time
Difference between rotational and angular velocity The discussion clarifies the distinction between rotational velocity and angular velocity Angular velocity is defined as the rate of change of angle over time, measured in radians per second, while rotational velocity can refer to either the number of revolutions per unit time or the linear velocity of a point on the circumference of a circle
Understanding Momentum: The Relationship Between Mass, Velocity, and . . . The discussion centers on the relationship between mass, velocity, and force, emphasizing that momentum is a vector quantity defined by the equation F = dp dt It is established that a greater force is required to change the motion of more massive bodies, as illustrated by examples involving vehicles and falling stones
Can you have a negative average velocity? • Physics Forums Negative average velocity is achievable in a multi-dimensional context, particularly when considering directional movement For instance, if a vehicle travels north at 10 mph for one hour and then south at 10 mph for another hour, the average velocity is zero, as the displacement returns to the starting point However, if the vehicle continues south for a third hour, the average velocity
How Long Does It Take a Person to Reach Terminal Velocity? This discussion focuses on estimating the time it takes for a person to reach terminal velocity while falling in Earth's gravitational field, considering factors such as body orientation and air resistance The estimated terminal velocity for a human in a flat position is approximately 100-120 mph, depending on body exposure to air resistance
Phase velocity and wave velocity - Physics Forums The discussion clarifies that wave velocity and phase velocity are numerically equivalent, defined by the equation v = ω k, where ω is angular frequency and k is wavenumber While they represent the same quantity, the terms are used in different contexts within wave physics The conversation also distinguishes between phase velocity, group velocity, and signal velocity, noting that group