A toy airplane, attached to a force meter by a string, flies in a horizontal circle. Design two independent experiments to determine the magnitude of the sum of
forces (the net force) exerted on the airplane when it flies in a circle.

i believe it is b. what was the cause of the big bang

hope this !

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.

that would be because of both gravity and friction. so     c