If there is a change in an object's speed, then it is accelerating
An object may accelerate at a steady rate, this is called constant acceleration
On a speed-time graph this will be a non-horizontal straight line
An object may accelerate at an increasing rate
On a speed-time graph this would be an upward curve with an increasing gradient
An object may accelerate at a decreasing rate
On a speed-time graph this would be an upward curve with a decreasing gradient
An object is said to decelerate if its speed is decreasing over time, i.e. its acceleration is negative
On a speed-time graph this would be a downward line
If the line is a non-horizontal straight line, deceleration is constant
If the line is a curve with an increasing gradient, deceleration is increasing
If the line is a curve with a decreasing gradient, deceleration is decreasing
Calculating Acceleration
The acceleration of an object can be calculated from the gradient of a speed-time graph
![HOW TO ANALAYSE A PERSON, TO IF HE IS GOOD OR BAD. [MY EXPIRENCE]](https://static.wixstatic.com/media/338b83_3327cd5272eb4e17a1de3b1cab48e7a3~mv2.png/v1/fill/w_1024,h_578,fp_0.50_0.50,q_35,blur_30,enc_avif,quality_auto/338b83_3327cd5272eb4e17a1de3b1cab48e7a3~mv2.png)
![HOW TO ANALAYSE A PERSON, TO IF HE IS GOOD OR BAD. [MY EXPIRENCE]](https://static.wixstatic.com/media/338b83_3327cd5272eb4e17a1de3b1cab48e7a3~mv2.png/v1/fill/w_312,h_176,fp_0.50_0.50,q_95,enc_avif,quality_auto/338b83_3327cd5272eb4e17a1de3b1cab48e7a3~mv2.png)
