The particle’s velocity at 1.0 s in (b) is negative, because it is traveling in the negative direction. At 1.0 s it is back at the origin where it started. The reversal of direction can also be seen in (b) at 0.5 s where the velocity is zero and then turns negative. In (a), the graph shows the particle moving in the positive direction until t = 0.5 s, when it reverses direction. By graphing the position, velocity, and speed as functions of time, we can understand these concepts visually Figure. The speed gives the magnitude of the velocity. The velocity of the particle gives us direction information, indicating the particle is moving to the left (west) or right (east). The instantaneous velocity at a specific time point Speed is measured through a device called an odometer.Like average velocity, instantaneous velocity is a vector with dimension of length per time.The value of average speed can never be zero or negative.Average Speed Formula = Total Distance Covered / Total Time Taken.Average Speed is calculated by dividing the total distance covered by the total time taken.It is a scalar quantity with only magnitude and no direction.Average Speed is defined as the mean value of the speed of an object over a period of time.When 'n' different speeds, s 1, s 2, s 3.s n are given for 'n' respective time intervals, t 1, t 2, t 3.t n respectively, the average speed formula is given as The distance is given by the product of s 1×t 1, and s 2×t 2. Thus, the average speed of the ball is 4 m/s.Īverage Speed Formula is applicable in different cases which are described as below: Case 1įor an object traveling with a speed of s 1 for time t 1, and the speed of s 2 for time t 2, the average speed formula is given below. Average Speed of the Ball = 72/18 = 4 m/s.If the distance between points A and B is 36m, what will be the average speed of the person? Thus, the average speed of the object is 60 m/s.Įxample 2: A ball moves from Point A to Point B in 10s and returns back in 8s. Average Speed of Object = 360/60 m/s = 60 m/s.Average Speed = Total Distance Travelled (D) / Total Time Taken (T).Total Distance Travelled D = 80 + 120 + 160 m = 360 ms.Distance Travelled in the Last 20s, D 3 = 20 × 8 m =100 m.
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