SammyS said:What have you tried?
Where are you stuck?
We shouldn't try to help until we have seen that you have tried.
gneill said:It could be that they want you to assume that the cross sectional area of the airstream is defined by the span of the blades as they rotate.
Hafid Iqbal said:I still can't get the answer... :(
Anyway, the book says its answer is 77 Ampere
gneill said:Start with determining the volumetric rate (m3/s) at which air is passing the windmill cross section. Then turn that into mass rate by multiplying by density. What do you get?
Hafid Iqbal said:How to find volumetric rate sir? If I multiply it by density, i wiil get mass rate...
Velocity is a vector quantity that includes both the magnitude (speed) and direction of motion. Speed, on the other hand, is a scalar quantity that only describes the magnitude of motion.
This represents a decrease in the velocity of an object from 12 meters per second to 7 meters per second.
Yes, velocity can change without a change in speed if the direction of motion changes. For example, if an object is moving in a circular path at a constant speed, its velocity is constantly changing because the direction of motion is constantly changing.
Velocity is typically measured in meters per second (m/s) or other units of distance divided by time.
An object's velocity can be affected by changes in speed, direction, or both. Other factors such as gravity, friction, and air resistance can also impact an object's velocity.