The sum of the initial and final velocity is divided by 2 to find the average. The SI unit for velocity is meters per second or ms but many other units such as kmh mph and cms are commonly used. C Find the average acceleration of the object during the time interval from 0 to 4 s.
Initial velocity u 24ms-1 Final velocity v 0 ms-1 Time taken t 4 s.
S v i t ½at 2. After undergoing uniform deceleration for 4 s it stopped in front of the traffic light. V av st v i ½at Acceleration x time equals the total change in velocity or v f - v. Find the positions on the graph that represent the initial position and final position.