Consider this: On the average waterslide, riders splash along at 20 to 30 miles per hour. But the average airplane flies 600 miles per hour. That's 20 times faster than a person travels on a waterslide.
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A free-fall slide starting at 85-feet with a gradual slope of 25 feet that drops to a steep 60 feet, THE MONSTER will leave you breathless. With nothing to hold onto for dear life, and no bounces to break the free fall, you'll hit speeds of up to 25 miles an hour!
Heavier people will have more friction force and may slide slower. If the slide is long enough, a heavier person's higher momentum may allow a higher average velocity. I remember when I was a little kid, I was so light that I couldn't even slide on some slides that the bigger kids had no problem with.
Gravity pulls the rider toward the Earth, helping to speed up their trip down the waterslide. Of course, friction also plays a part. Whether a person rides down the slide on their backs, a mat, or an intertube, the contact causes friction. This can slow the rider down.
35 degrees is more normal, 40 is a little steep. A drop slide can be as steep as 60 degrees at the top, but will need a much longer run out at the bottom to make the overall average angle stay within the 40 degree guideline.
Height: 164 feet / 49 metersKilimanjaro is the current “world's tallest water slide.” The slide holds the record for the highest drop height on a body slide.
Expose to the ride slowlyBefore taking that water slide, make sure to spend some time exposing yourself or your child to it. Watch others do it for a while or let your child watch how other kids are actually enjoying residential water slides. This will help them prep before actually doing it.
As you slide into the turn, it's the design of the slide that keeps you safe. The walls are built up to keep you from propelling over the side. Water also plays a part in the design of the rides. Deeper water propels heavier riders along to keep them moving smoothly.
The rate of injury recorded by the slide operators was 8.1 per 10,000 rides sold, and the rate of medically treated injuries was 3.0/10,000. The 65 medically treated sliders ranged in age from 8 years to 45 years.
Keep small children off big slidesThe taller the waterslide, the greater the danger of a fall. Children can squeeze through barriers or stairwells, putting them at risk of getting into places they shouldn't be.
Since the water moves back as you push it, you need to go twice as fast as that or you would stand still. So that's a running speed of almost 80 km/hr, which would be quite impossible even in my idealised calculation that ignores things like fluid drag.