Average Speed vs Average Velocity In symbols, Caution: Acceleration could either be positive or negative. Average speed is the distance traveled over the time of travel. Constant speed doesn't necessarily mean constant velocity, but constant velocity always means constant speed A cheetahs top speed is 114kph (70mph). Other units used are kilometers per hour (kph), miles per hour (mph), feet per second (fps). The SI unit used for speed and velocity is meter per second (m/s). Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. about 8 minutes and 9 seconds from Sun to Earth. Motion Distance and Displacement Light from the Earth takes just 1.255 seconds to reach the Moon. An object is accelerating if it is changing its velocity.
a change in position with respect to a reference frame Acceleration Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. In equation velocity = displacement/time. Average velocity is the change in position (displacement) over the time of travel. there are terminologies to remember when describing motion, these are: Sound travels 15 times faster through steel than air Average Speed vs Instantaneous Speed Velocity is a vector quantity that refers to "the rate at which an object changes its position. An object can still be accelerating although it has constant speed. Units: Kinematics - is the science of describing the motion of objects using words, diagrams, numbers, graphs, and equations Notes Instantaneous Speed - the speed at any given instant in time.
Speed vs Velocity Describing Motion Speed is a scalar quantity that refers to "how fast an object is moving." Speed can be thought of as the rate at which an object covers distance.
Transcript: Displacement is a vector quantity that refers to "how far out of place an object is" it is the object's overall change in position.
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