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

AI Thread Summary
The discussion revolves around 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 output during acceleration is calculated at 10,000 Watts. A question arises regarding the resistive force when the vehicle moves through water at a constant speed of 2 m/s, with confusion surrounding the concept of resistive force and constant velocity. Constant velocity implies that the net force acting on the vehicle is zero, meaning any applied force is balanced by resistive forces. Clarification on these concepts is essential for solving the problem accurately.
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.
 
Physics news on Phys.org
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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