Physics
posted by Jeanne .
In this problem, use g = 9.80 m/s2.
Bizarro, located at Six Flags New England, in Agawam, MA, is the name of one of the toprated roller coasters in the country. The first drop on the roller coaster brings you down 67 meters.
There are some resistive forces acting as the roller coaster comes down, of course, so let's say you actually reach the bottom of the hill with a speed of merely 75.0 miles per hour. In addition, let's say that the bottom of the hill is a vertical circular arc with a radius of 50.0 m. Figure out the size of the upward normal force acting on you at the bottom of the hill, and then divide by the force of gravity acting on you  this will give you the "gforce" (in units of g, the acceleration due to gravity), you experience at the bottom of the hill.
I thought it would be F=ma=[(m*v^2)/r]mg and the m's could be factored out since it is not given and to get g force I would divide by g= 9.8 and got ~11.3, but it is not right. Is my reasoning flawed somewhere?

The force acting at the bottom of the loop is [(m*v^2)/r] + mg
You got the sign wrong. There may be another error as well.
75 mph = 110 ft/s = 33.53 m/s
v^2/r = 22.5 m/s^2
(v^2/r + g)/g = 3.29
Respond to this Question
Similar Questions

Physics
we are doing a really dumb websearch in my Physics class on roller coasters and I really need help with like 5 problems! For the websearch I need to cite it so if you could provide any answers I also need the website! thanks in advance!!! … 
science
An amusement park has 2 roller coasters, a red one and a blue one. The first hill on the red roller coaster drops 10 meters. The blue roller coaster drops 25 meters. On which roller coaster will cars have the greater kinetic energy … 
Physics Elena please help!
Part of a rollercoaster ride involves coasting down an incline and entering a loop 30.0 m in diameter. For safety considerations, the roller coasters speed at the top of the loop must be such that the force of the seat on a rider … 
physics
Part of a rollercoaster ride involves coasting down an incline and entering a loop 27.0 m in diameter. For safety considerations, the roller coasters speed at the top of the loop must be such that the force of the seat on a rider … 
algebra
Do you like roller coasters? If you were asked to design a roller coaster, what would it look like? 
Math
17.Which roller coaster has the greatest lift height Top Thrill Dragster 18.What is the median lift height for the roller coasters lifted? 
Physics
Analyzing Roller Coaster Performance Using Conservation of Mechanical Energy At the beginning of a roller coaster ride, the car is lifted to the top of a large hill and released. The speed of the car at the top of the hill is small, … 
Physics
This speed is the maximum possible speed attained by the roller coaster, or the “theoretical speed”. Roller coasters are carefully designed to minimize frictional forces so that they approach these theoretical speeds. The efficiency … 
Physics
This speed is the maximum possible speed attained by the roller coaster, or the “theoretical speed”. Roller coasters are carefully designed to minimize frictional forces so that they approach these theoretical speeds. The efficiency … 
Physics
This speed is the maximum possible speed attained by the roller coaster, or the “theoretical speed”. Roller coasters are carefully designed to minimize frictional forces so that they approach these theoretical speeds. The efficiency …