If no direction is mentioned, then you have a speed. Example: "30 miles per hour".
If the direction is mentioned, then you have a velocity. Example: "30 miles per hour north".
Speed is the magnitude of distance travelled per unit time, whereas velocity depends on the magnitude of distance travelled as well as the direction of motion. Speed is a scalar quantity, velocity is a vector. Speed cannot be negative, velocity can be negative. Average speed of an object after travelling a certain distance is always non-zero, but for velocity the average velocity can be zero (this follows from the previous idea).
Part of every velocity is a speed. Speed is the size of the velocity.But the velocity also has a direction, which the speed doesn't.'30 mph North' and '30 mph West' are the same speed but different velocity.
speed is the distance traveled per unit time, and it is the rate at which something happens; "the project advanced with gratifying speed". While velocity is the rate of speed with which something happens; rapidity of action or reaction.Additional answerI don't understand any of the above. Speed is the rate that something moves, but without a particular direction. Velocity is the speed in a particular direction. Velocity is a scientific quantity, really. You probably wouldn't make this distinction in eveyday life.
No, an object cannot have constant velocity and variable speed. Velocity is a vector quantity that includes both speed and direction. If the object's velocity is constant, then its speed must also be constant.
No, a particle cannot have zero speed and non-zero velocity simultaneously. Speed is the magnitude of velocity and if speed is zero, then velocity must also be zero.
Velocity is a vector: it has a direction. The others are all scalars. The dimensions of the scalars are Speed : [LT-1] Time: [T] Distance: [L]
Speed is the magnitude of distance travelled per unit time, whereas velocity depends on the magnitude of distance travelled as well as the direction of motion. Speed is a scalar quantity, velocity is a vector. Speed cannot be negative, velocity can be negative. Average speed of an object after travelling a certain distance is always non-zero, but for velocity the average velocity can be zero (this follows from the previous idea).
Speed in a given direction is velocity.
SPEED has the speed only; while VELOCITY has the direction and the speed.
Part of every velocity is a speed. Speed is the size of the velocity.But the velocity also has a direction, which the speed doesn't.'30 mph North' and '30 mph West' are the same speed but different velocity.
Speed in a given direction is called velocity.
Velocity is speed and direction
Velocity is speed with a direction
It is the speed or velocity at a particular instant.
Speed is a scalar, velocity is a vector. In other words, when the direction of the speed is relevant, it is called a velocity.
speed is the distance traveled per unit time, and it is the rate at which something happens; "the project advanced with gratifying speed". While velocity is the rate of speed with which something happens; rapidity of action or reaction.Additional answerI don't understand any of the above. Speed is the rate that something moves, but without a particular direction. Velocity is the speed in a particular direction. Velocity is a scientific quantity, really. You probably wouldn't make this distinction in eveyday life.
the object's 'velocity'