Dynamics Question: Calculate Resistive Force on Car

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SUMMARY

The discussion focuses on calculating the total resistive force acting on a car with a mass of 1600 kg traveling at a constant speed of 72 km/h on a downhill slope. The slope descends 200 m over a distance of 6000 m. Using the equations P=FV and f=ma, participants are tasked with determining the combined effects of friction and air resistance on the vehicle's motion. The problem emphasizes the importance of understanding forces in dynamics and their application in real-world scenarios.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with basic physics equations (P=FV, f=ma)
  • Knowledge of resistive forces including friction and air resistance
  • Concept of gravitational potential energy and its conversion to kinetic energy
NEXT STEPS
  • Calculate the gravitational force acting on the car using the slope's elevation change
  • Explore the relationship between speed and air resistance in physics
  • Learn about the coefficients of friction for different surfaces
  • Investigate the impact of slope angle on resistive forces
USEFUL FOR

Students studying physics, particularly those focusing on dynamics, as well as educators and anyone interested in understanding the forces acting on vehicles in motion.

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Homework Statement



Along a certain section of road a car (mass 1600kg) will coast in neutral at a constant speed of 72 km/h if there is no wind. Examination of a topological map shows that for this section of road the elevation decreases by 200m for each 6000m of road. What is the total resistive force (friction plus air resistance) that acts on the car when it is traveling at 72 km/h?

Homework Equations



P=FV, f=ma

The Attempt at a Solution



Please see the image attached

-Thanks for any help
 

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