A "radar gun" is used by police to know the speed of fast moving vehicles.
Velocity is a vector. That means it has magnitude and direction. Its magnitude is same as speed.
The linear acceleration equation is a (vf - vi) / t, where a is acceleration, vf is final velocity, vi is initial velocity, and t is time. This equation is used to calculate the acceleration of an object moving in a straight line by finding the change in velocity over time.
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Accelerometer readings measure the acceleration of a moving object, which can be used to calculate the object's velocity. By integrating the acceleration data over time, the velocity of the object can be determined.
A vector is used to represent direction and magnitude of speed. Velocity is the speed of an object and a specification of its direction of motion. Speed describes only how fast an object is moving, whereas velocity gives both how fast and in what direction the object is moving. Therefore a vector can be used to represent a velocity. The term "resultant velocity" implies a change in velocity which can be determined using vector analysis.
Momentum is mass times velocity. Note that velocity and speed are not exactly the same thing. Velocity is a term used in physics to define both the speed and the direction of a moving object, so if two objects are moving at the same speed but in opposite directions, they have opposite momentum.
Velocity addition is used when dealing with two objects moving at different velocities relative to each other. It helps calculate the combined velocity of the objects when seen from a different reference frame.
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It is used for slowing or stopping a moving vehicle.
It is used for slowing or stopping a moving vehicle.
velocity = distance / time There are also some formulae involving acceleration; for example, in the case of constant acceleration: velocity = initial velocity + acceleration x time If the acceleration is not constant, an integral is used instead.
Inertia
A radar gun is commonly used to measure the velocity of a moving human. It works by sending and receiving radar waves that bounce off the moving person and calculate their speed based on the Doppler effect.