1) Speed is the distance traveled divided by the time take to travel that distance. Velocity is the speed of the object and the direction of its motion. Acceleration is the change in velocity divided by the time it takes for the change to occur.
2) Its going at a constant speed and then is slowing down.
3) You have a positive acceleration.
4) 1/4 acceleration
5) 19.6 is the total speed.
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