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You don't. Velocity is not directly related to mass, and you can't calculate velocity just from a displacement measurement. You need some more information.
Time and velocity
Speed and Velocity are two different things . Velocity- "the rate at which an object changes its position." Speed- "How fast an object is moving". To calculate speed and velocity, you first need to calculate distance and time. Velocity is considered to be a more logical term
I guess that would depend on what you want to calculate (the charge? the velocity? the average energy of the charges?), and what information is given.
I don't think that's enough information.
That's not enough information. You need some additional information to calculate the mass.
You don't. Velocity is not directly related to mass, and you can't calculate velocity just from a displacement measurement. You need some more information.
Time and velocity
Speed and Velocity are two different things . Velocity- "the rate at which an object changes its position." Speed- "How fast an object is moving". To calculate speed and velocity, you first need to calculate distance and time. Velocity is considered to be a more logical term
You need to have displacement and time for you to determine the velocity.
More information is needed.
There is not enough information to calculate the answer.
Assuming that "r" is the radius, that simply isn't sufficient information to calculate angular velocity.
I guess that would depend on what you want to calculate (the charge? the velocity? the average energy of the charges?), and what information is given.
That depends on what information is provided. If you don't have any information, you may actually need to measure the speed of the water; or you may want to measure the flow (for example, in liters per second), and the pipe diameter, and then calculate the speed from that.
That depends: based on what information? One calculation you might do is to add the original velocity with the velocity change (vector addition). However, normally you would proceed the other way: you would have to MEASURE the original velocity and the final velocity, and THEN calculate the difference in velocity.f
If the direction of motion is constant then the velocity is the same as the speed in that direction. If the direction is not constant, the information given is nowhere near sufficient to calculate the velocity.