![]() You step on the accelerator and the car speeds up, increasing its velocity. Acceleration can be experienced every day in a vehicle. Acceleration is often referred to as "speeding up", but it really measures changes in velocity. It has dimensions of length and time over time. Acceleration is defined as a vector quantity that indicates the rate of change of velocity. Example 3 Suppose a bus travels 180 km in 3 hours Calculate speed of bus in Kilometer/hour meter per minute meter per seconds centimeter per seconds.Speed measures distance, a scalar quantity that measures the total length of an object's path. Unlike speed, velocity measures displacement, a vector quantity indicating the difference between an object's final and initial positions. Velocity is a vector quantity that indicates displacement, time, and direction.Speed is often described simply as the distance traveled per unit of time. Put another way, speed is a measure of distance traveled over a certain amount of time. t) graph corresponds to the change of velocity. Speed, distance and time are three important variables in the field of physics.Speed is a concept of motion that determines how fast or slow an object is moving from one point to another.Speed is defined as the distance travelled in unit time.When time is constant, distance is directly proportional to speed and velocity. By the fundamental theorem of calculus, it can be seen that the integral of the acceleration function a(t) is the velocity function v(t) that is, the area under the curve of an acceleration vs. ![]()
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