Two students decide to investigate the motion of electric karts on a straight track.
a.[4]
Describe how the students will take the measurements they need to be able to calculate the mean speed of a kart along a section of the track.
b.[1]
The students also investigate the motion of two karts, X and Y. The velocity–time graph shows their results.
Which kart, X or Y, has the greater acceleration? Explain your answer.
c.[3]
Use the graph to calculate the acceleration of kart Y.
d.[1]
Both karts have the same mass. Suggest why it takes different amounts of time for them to reach their top speed of 4.0 m/s4.0\text{ m/s}4.0 m/s.