Car a is traveling at 40 mi/h when it enters a 30 mi/h speed zone. the driver of car a decelerates at a rate of 16 ft/s2 until reaching a speed of 30 mi/h, which she then maintains. when car b, which was initially 60 ft behind car a and traveling at a constant speed of 45 mi/h, enters the speed zone, its driver decelerates at a rate of 20 ft/s2 until reaching a speed of 28 mi/h. knowing that the driver of car b maintains a speed of 28 mi/h, determine (a) the closest that car b comes to car a, (b) the time at which car a is 70 ft in front of car b.

the higher the current the higher the mag field around it the higher the influence on the compass

  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.

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.