Initial Velocity Formula
The velocity at which motion start is termed as Initial Velocity. It is velocity at time interval t = 0. It is represented by u.Three initial velocity formulas are there-
If final time, acceleration and velocity are provided. The initial velocity is articulated as,
u =v – at
If final velocity, acceleration, and distance are provided we make use of
u2 = v2 – 2as
If distance, acceleration and time are provided. The initial velocity is
Initial velocity = u,
Final Velocity = v,
time taken = t,
distance traveled or displacement = s,
acceleration = a
Initial Velocity formula is made use of to find the initial velocity of the body if some of the quantities are given. Initial velocity is articulated in meter per second (m/s).
Initial Velocity Solved Examples
Below are some problems based on Initial velocity which may be helpful for you.
Problem 1: Johny completes the bicycle ride with the final velocity of 10 ms-1 and acceleration 2 ms-2 within 3s. Calculate the initial velocity.
Given: v (Final velocity) = 10 ms-1,
a (Acceleration) = 2ms-2,
t (Time taken) = 3 s
u (Initial velocity) = ?
v (Final velocity) = u + at
u (Initial velocity) = v – at = 10 ms-1 – (2ms-2)3s
= 4 ms-1
∴ (Initial velocity) u = 4ms-1
Problem 2: A man covers a distance of 100 m. If he has a final velocity of 40 ms-1 and has acceleration of 6 ms-2. Compute his initial velocity?
Given: Distance s = 100m,
(Final velocity) v = 40 ms-1,
(Acceleration) a = 6ms-2
(Initial velocity) u2 = v2 – 2as
= 1600 – 2 ×× 6 ×× 100
= 1600 – 1200
= 400 ms-1
∴ (Initial velocity) u = 20 ms-1.