What is the minimum kinetic energy for this roller coaster ride?

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SUMMARY

The minimum kinetic energy required at point A of a roller coaster with a loop radius of 12m, to achieve a velocity of 27m/s at the top of the loop, is calculated using the total energy equation that incorporates kinetic energy (Ek), potential energy (Ep), and work done against friction (Ff). The total distance traveled to the top of the loop is 87.68m, and the average frictional force is 40N, with a passenger mass of 50kg. The calculated total energy required is 33,636.25 Joules, which includes contributions from kinetic energy, gravitational potential energy, and frictional work.

PREREQUISITES
  • Understanding of kinetic energy and potential energy equations
  • Familiarity with the concepts of friction and work in physics
  • Basic knowledge of roller coaster dynamics and motion
  • Ability to perform calculations involving mass, distance, and forces
NEXT STEPS
  • Study the principles of energy conservation in mechanical systems
  • Learn about the effects of friction on motion in roller coasters
  • Explore the dynamics of circular motion and centripetal force
  • Investigate the role of gravitational potential energy in roller coaster design
USEFUL FOR

Physics students, mechanical engineers, roller coaster designers, and anyone interested in the dynamics of motion and energy in amusement park rides.

rrosa522
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Homework Statement


A rollercoaster has a loop with a radius of 12m. The coaster travels 50m and at point A, enters the loop. The average frictional force on the coaster is 40N. The mass of passenger is 50kg. What is the minimum kinetic energy required at point A to generate a velocity of 27m/s at the top of the loop.

Homework Equations

The Attempt at a Solution


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Is my solution correct?

total distance to the top of the loop = (2*pi*r)/2+50= 87.68
total Energy required = Ek+Ep+ Ff
=((1/2)(27.)^2(50))+(9.81*50*24)+ (40*87.6)
=33636.25
 
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Is there a diagram to accompany this question? It's difficult to tell from your description where exactly "point A" is located with respect to the loop's circumference, or what effect if any the 50 m travel distance up to point A has on subsequent motion. Is the mass of the coaster given?
 
Check the rounding.
rrosa522 said:
What is the minimum kinetic energy required at point A to generate a velocity of 27m/s at the top of the loop.
A is a point on the loop, why did you take friction before point A into account?
 

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