Average Velocity Formula

As the word states, Average Velocity is the average value of the known velocities. Average Velocity is defined as the total displacement travelled by the body in time t. The average velocity is denoted by V_av and can be determined using the following formula:

Based on the values given, the above formula can also be written as:

(i) If any distances x_i and x_f with their corresponding time intervals t_i and t_f are given we use the formula:

x_i = Initial Distance

x_f  =Final distance

t_i = Initial time

t_f = Final time

(ii) If final Velocity V and Initial velocity U are known, we make use of the formula:

Where,
U = Initial Velocity and
V = Final Velocity

(iii) If there are diverse distances like d₁, d₂, d₃ ……. d_n for diverse time intervals t₁, t₂, t₃,… t_n then

Average Velocity Problem

Problem 1: A car is moving with an initial velocity of 30 m/s and it touches its destiny at 80 m/s. Calculate its average velocity. 
Answer:

Given: Initial Velocity U = 30 m/s
Final velocity V = 80 m/s

Average velocity V_av = (30 + 80)/2

Average velocity V_av = 55 m/s