httpphetcoloradoeduensimulationlegacyelectrichockey use link

http://phet.colorado.edu/en/simulation/legacy/electric-hockey

use link above:

Questions 7–15 refer to the \"Electric Field Hockey\" simulation. Refer to the figure shown in step #6 on the Lesson 3 webpage to check your settings for this simulation.

7.

(2 points) Take a positive red ball from the box and place it directly south of the puck. An arrow will show up on the puck, indicating the size and direction of the electrostatic force the red charge applies to the black charge. As the red charge is brought closer to the black charge, the force on the black charge

8.

(2 points) The direction of the force on the black positive charge is

9.

(2 points) The direction of the force on the red positive charge will be

10.

(2 points) Click on the \"Start\" button. What happens?

11.

(2 points) Place the red charge back in the box. Take a blue negative charge and place it directly north of the black positive charge. Take another blue charge and place it directly east of the black positive charge at approximately the same distance as the other blue charge. The direction of the electric force exerted by each blue charge on the black charge is indicated by an arrow. What is the direction of the resultant force acting on the black charge?

12.

(2 points) Now click on the \"Start\" button. Which direction did the black charge go?

13.

(2 points) Click on the \"Reset\" button. Take a blue negative charge and place it directly north of the black positive charge. Take a red positive charge and place it directly east of the black positive charge at approximately the same distance as the blue charge. The direction of the electric force exerted by the blue and red charge on the black charge is indicated by an arrow. What is the direction of the resultant force acting on the black charge?

14.

(2 points) Now click on the \"Start\" button. Which direction did the black charge go?

Solution

7.on decreasing seperatios force increases,

optomo(b) is correct.

8. force experience by it is along north direction,

option (b) is correct.

9.

option (a) is correct i.e. to the south.

10. due to force of repulsion, black charge moves away from red charge with linearly changing acceleration.

option ( d) is correct.

according to chegg guidelines we can solve four subparts of single problem at a time so please reattach your other problems seperately..goodluck