sorry that's doesn't really help :S maybe you could explain what variables the letters represent?
here is a link to the graph
http://www.appendixj.org.au/mystuff/physics.jpg
Homework Statement
The questions refer to the attached graph
Q1 - calculate the instantaneous velocity of the object at time 2.5s
Q2 - calculate the instantaneous velocity of the object at time 7.5s
Q3- calculate the average velocity over the time of 7.5s
Q4- Is the motion of the...