What is the magnitude of the net force causing the box to accelerate? What direction will it accelerate?

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we need to know the time interval during which the force acts. impulse of force = momentum change

f=ma newton

f=100x2.5=250n

  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.