Answer:
The speed of marble is 1.5 m/s
Step-by-step explanation:
Consider the graph shown below.
As we know: [tex]speed=\frac{Distance}{Time}[/tex]
To find the speed we need to substitute the value of distance and time by using the graph shown below.
From the graph we know when time was 0s marble covers a distance of 0 m.
When time was 2s marble covers a distance of 3 m.
Now substitute the value of distance and time in above formula.
[tex]speed=\frac{3}{2}[/tex]
[tex]speed=1.5[/tex]
Hence, the speed of marble is 1.5 m/s