Question

A distance-time graph indicates that an object travels 2 m in 2 s and then travels another 80 m during the next 40 s. What is the average speed of the object?

Answer 1

The average speed of the object is given by the ratio between the total distance covered and the total time needed for the motion:

`v= (S)/(t)`

The total distance covered is:

`S=2m + 80 m = 82 m`
while the total time of the motion is

`t=2s+40 s=42 s`

Therefore, the average speed of the object is

`v= (S)/(t)= (82 m)/(42 m)=1.95 m/s`