Which of the following is true for the direction of an electric field? It is same as the direction of the force exerted on a negative test charge.
It is opposite to the direction of the force exerted on a positive test charge.
It is same as the direction of the force exerted on a positive test charge.
It is opposite to the direction of the force exerted on a neutral test charge.

2 m/s

Explanation:

The following data were obtained from the question:

Distance (D) = 40 m

Time (t) = 20 s.

Average speed =?

Average speed is the total distance travelled divided by the total time taken. Mathematically, it is expressed as:

Average speed = Total distance /Total time

Thus, we can obtain the average speed as follow:

Total Distance (D) = 40 m

Time time (t) = 20 s.

Average speed =?

Average speed = Total distance /Total time

Average spee= 40/20

Average speed = 2 m/s

Therefore, the average speed between 0 and 20 seconds is 2 m/s.