How To Find Deceleration From Speed Time Graph. This indicates the opposite of acceleration which is a decrease in speed also called deceleration. The deceleration will be computed by dividing the final velocity minus the initial velocity, by the amount of time is taken for this drop in velocity.

Acceleration is change in velocity divided by time. The green line shows a slower deceleration from 10 to 0 m/s over 20 s. The deceleration will be computed by dividing the final velocity minus the initial velocity, by the amount of time is taken for this drop in velocity.

How To Calculate Deceleration With Speed And Distance. The product of the train's mass (m), the train's acceleration rate (a) (deceleration is negative acceleration) and the stopping distance (s). Deceleration is the final velocity minus the initial velocity, with a negative sign in the result because the velocity is dropping.

This equation is the third equation of motion and is given by the relation. If the speed is in miles per hour, convert that speed to metres per second by multiplying kilometers per hour by 0.278. In this time it covers a distance of 20 s × 12 m/s = 240 m, the area of the rectangle.