Calculating Kinetic Energy, Power & Resistive Force of an Amphibious Vehicle

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SUMMARY

The discussion focuses on calculating the kinetic energy, average power, and resistive force of a 5000kg amphibious vehicle. The final kinetic energy is determined to be 250,000 Joules, and the average power produced by the engine during acceleration is calculated at 10,000 Watts. When the vehicle moves through water at a constant speed of 2 m/s, the resistive force that must be overcome can be derived from the power equation, indicating a need for further clarification on the concept of resistive force and net force at constant velocity.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with the kinetic energy formula (KE = 0.5 * m * v^2)
  • Basic knowledge of power calculations (Power = Work / Time)
  • Concept of resistive forces in physics
NEXT STEPS
  • Study the relationship between power and resistive forces in fluid dynamics
  • Learn about the implications of constant velocity on net force
  • Explore the concept of instantaneous acceleration in physics
  • Investigate the effects of drag on vehicles moving through water
USEFUL FOR

Students studying physics, particularly those focused on mechanics and fluid dynamics, as well as engineers working on vehicle design and performance optimization.

SalsaOnMyTaco
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Homework Statement


On Land, a 5000kg amphibious vehicle can accelerate from rest to 10 m/s in 25 sec.


Find...
a)Final Kinetic Energy?
-250,000
b)Avg Power furnished by engine during acceleration?
-10,000
c)If the same power is required to propel the vehicle through water at a constant 2 m/s, What is the magnitude of the resistive force being overcome?

The attempt at a solution
I haven't learn or don't know what is the meaning of Resistive Force, I tried searching for a formula online but they do not make sense.
 
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This is a force that resists the motion. What does constant velocity mean?
 
speed remains the same, it does not increase or decrease
 
Yes, but what does that mean regarding the net force acting on the vehicle?
 
instantaneous acceleration?
 

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