Where do we feel the least weight on a roller coaster?
The normal force however has a small magnitude at the top of the loop (where the rider often feels weightless) and a large magnitude at the bottom of the loop (where the rider often feels heavy).
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The same can be said for this phenomenon on roller coasters. “You feel very light at the top of loops, but heavier than usual at the bottom” (Boston University).
Riders may experience weightlessness at the tops of hills (negative g-forces) and feel heavy at the bottoms of hills (positive g-forces). This feeling is caused by the change in direction of the roller coaster. At the top of a roller coaster, the car goes from moving upward to flat to moving downward.
At the bottom of the loop, gravity and the change in direction of the passenger's inertia from a downward vertical direction to one that is horizontal push the passenger into the seat, causing the passenger to once again feel very heavy.
The normal force however has a small magnitude at the top of the loop (where the rider often feels weightless) and a large magnitude at the bottom of the loop (where the rider often feels heavy).
Roller coasters are generally designed to have non-zero but fairly small normal forces at the top, so a rider feels almost weightless. At the bottom of the loop, the apparent weight can be considerably larger than mg, so a rider feels much heavier than usual.
If you love the feeling of weightlessness, head for the back. If you want the best view of the action, head for the front. The cars in the middle provide the weakest ride, but it's a good bet you'll still have a good time.
It's the combination of lift hill and drop that are the scary parts for me. The lift hill builds anticipation so well, and then it's time for the hyper coaster level 90 degree descent, the first part of which occurs in total darkness.
The truth is that most visits to the amusement park are full of thrills, fun and are statistically quite safe. However, some amusement park rides, and especially roller coasters, are a significant cause of neck and spine injuries. While these injuries don't make the nightly news, they can slow you down.
“As far as an age limit, though, if you are physically healthy and up for the thrill, there is likely no greater risk for someone who is 60 than there is for someone who is 20.” The largest concern for those who indulge in roller coasters is the after effects.
People with high blood pressure and/or heart conditions are warned not to ride roller coasters because of the way they tax the cardiovascular system. The adrenaline rush that roller coasters give you causes a rapid spike in your heart rate and blood pressure.
Support. Another thing you can do throughout this process and at the moment of actually riding a roller coaster for the first time is to surround yourself with people who can support you. Having friends or family with you can be very reassuring and can help you feel less nervous or worried about facing your fear.
Bring a Friend. A well-chosen support person can help you slowly work through your fears. A friend can preview each coaster before you ride, letting you know exactly what to expect. Your support person can also provide a hand to hold and a shoulder to lean on.
Basic mathematical subjects such as calculus help determine the height needed to allow the car to get up the next hill, the maximum speed, and the angles of ascent and descent. These calculations also help make sure that the roller coaster is safe. No doubt about it--math keeps you on track.