The average velocity in a particular direction = distance travelled in that direction / time taken.
Velocity is a vector so the direction is important. If I go from A to B and then return to A my average velocity will be zero. My speed, on the other hand, will not be zero.
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.
The formula used to calculate the surface of a 90 degree elbow is pi^2 *. This formula is taught in geometry class.
The parallax method can be used to calculate the distance between planets and other celestial bodies. The formula for this is d(pc) = 1/p where p is parallax measured in arcseconds.
Speed and Velocity are two words that mean the same. You may mean, "Can Velocity be 0 but acceleration not 0". Yes, this occurs when a moving object is changing direction (say from moving forwards to moving backwards) or is just about to move or, at that very instant has just come to a halt. In all these cases, speed /velocity is zero but the body is accelerating. Don't forget, the word acceleration is also used when an object is decelerating (slowing down).
Root mean square velocity is the measure of the velocity of gas particles that is used for solving problems. It is the square root of the average velocity-squared of the molecules in a gas. The formula for root mean square velocity is sqrt(3RT/Mm) where Mm is the molar mass of the gas in kg / mole, R is the gas constant, and T is the temperature in kelvin.
It is equal to 1/2 MV2, M=mass, V=velocity
Change in velocity / time
Accelaration= change in velocity/time taken OR Acceleration=final velocity- initial velocity/time taken
density=mass/volume
Mass divided by volume
v=d/t where d is the distance and t is the time
RPM is an expression of rotational velocity. It is the number of revolutions a rotating object makes on its own axis in one minute. RPM is used to calculate horsepower, linear velocity, gear ratios, and tangential velocity. The formula for roller rpm = Distance / Circumference.
A=Vf-Vi/t Acceleration is the final velocity minus the initial velocity divided by the time it too to reach it
weight=mass*gravity
One formula that is often used is: distance = speed x time
The product of an object's mass and its velocity is called its momentum. Sometimes it is also called linear momentum, to distinguish it from angular momentum - however, when the word "momentum" is used alone, it usually refers to linear momentum.
Mass of a body and its speed are needed to calculate kinetic energy. Kinetic energy of an object = mv2/2 This formula is useful only when object's speed is much less than speed of light.