put (dropX-(cartAccel4*timeElapsed*timeElapsed)/2) into x
put (dropY+(G*timeElapsed*timeElapsed)/2) into y
if (x < 0) or (y > 300) then exit repeat
put round(x) & "," & round(y) into newPoint
set the loc of button "ball" to newPoint
if trace4 is true then drag from oldPoint to newPoint
put newPoint into oldPoint
put timeElapsed+timeIncrement4 into timeElapsed
end repeat
choose browse tool
put "Click on this field to restore the screen." into field "blurb"
show menubar
end runExperiment
on openCard
global cardClear4,dropHeight4
if (cardClear4 is true) and (item 2 of the loc of button "ball" <> (300-dropheight4)) then
put false into cardClear1
click at the loc of field "blurb"
end if
end openCard
-- part 3 (button)
-- low flags: 00
-- high flags: 0000
-- rect: left=191 top=57 right=85 bottom=209
-- title width / last selected line: 0
-- icon id / first selected line: 16003 / 16003
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: Electromagnet
-- part 5 (button)
-- low flags: 00
-- high flags: 0000
-- rect: left=183 top=83 right=117 bottom=217
-- title width / last selected line: 0
-- icon id / first selected line: 8499 / 8499
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: Ball
-- part 6 (field)
-- low flags: 81
-- high flags: 2004
-- rect: left=11 top=40 right=326 bottom=403
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 0
-- font id: 3
-- text size: 12
-- style flags: 256
-- line height: 16
-- part name: Help
-- part contents for background part 5
----- text -----
Press this field to trace the path of the ball.
-- part contents for card part 6
----- text -----
This experiment is very similar to experiment #1. This experiment deals with a ball suspended from an electromagnet which is moving to the right with a constant acceleration. Thus, in the cart frame, the ball does not fall straight down. Instead, it falls in a straight diagonal line to the left. The exact angle of the line depends upon the acceleration of the electromagnet.
This card simulates that experiment. It will compute and draw the path of the ball in the cart frame based on the parameters you can set by clicking on the "Set Parameters" button in the control panel.
For a complete description of the experiment, click on the "Experiment Video" button in the control panel, then click on the first button in the list of selections which will appear.