A croquet ball moving at 4.0 m/s strikes another ball twice its mass that was standing still before the collision. The first ball
stops moving after the collision. What is the velocity of the
second ball after the collision?

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3.2x10^7

  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.

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