2006-09-27 06:48:04 · 4 answers · asked by xinrui y 1 in Science & Mathematics ➔ Physics
Hi. No, separate the cars. In a group of cars tied together the last car holds back the first which reduces the time of first car's free fall.
2006-09-27 06:59:02 · answer #1 · answered by Cirric 7 · 0⤊ 1⤋
Actually, the last cars are really the only ones to experience weightlessness. They are moving fast enough at the crest to throw you into the air and pull away fast enough so they no longer support you.
To test this, sit in the first car and also set a penny on your leg. Don't hold on but watch the penny. You'll stay in the seat and the penny will stay on your leg unless it is pushed laterally. Repeat the experiment in the last car. Probably the safety bar will pull you down and the penny will 'rise' above your head.
Carry the penny in a long transparent tube and measure the time it's floating in each car. Select the car with the longest time. The more accurately you measure the time, and the more times you repeat the trials, the more accurate your result will be, the more fun you will have, and the less likely your lunch will stay down.
2006-09-27 20:08:49 · answer #2 · answered by Frank N 7 · 0⤊ 0⤋
The sensation of weightlessness is only achieved during the free fall periods. The only way to extend this is to extend the length of time that the free fall takes place. This means that you can either slow down the fall, in which case you won't be quite as "weightless", although you will feel a longer period of lessened g forces, or you can extend the length of the track where the fall takes place, in which case you will be altering the design.
2006-09-27 13:51:21 · answer #3 · answered by Anonymous · 1⤊ 0⤋
The first answer is correct
2006-09-27 13:55:58 · answer #4 · answered by Tucker 1 · 0⤊ 0⤋