PDF chapter test TRY NOW

If the velocity of a golf ball in a straight line changes from 16 m/s to 8 m/s in 8 s in a uniform motion, then determine its deceleration.
 
What do you call this types of motion? .
 
The deceleration of the golf ball is \(=\)  \(m/s\).
 
[Note: Submit the answer in whole number]