Work done by gravity on a car rolling down a hill

In summary, the work done by gravity on a car rolling down a hill is the energy transferred to the car as it descends due to gravitational force. This work results in an increase in the car's kinetic energy, allowing it to accelerate down the slope. The amount of work depends on the height of the hill and the mass of the car, following the principle that work equals the change in potential energy as the car moves to a lower elevation.
  • #1
physicsmaster123
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I tried E =Fxcos0 but only ended up with 243kJ
1694284850662.png
 
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  • #2
What values of ##F##, ##x##, and ##\theta## did you use and why?
 
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  • #3
Hint: What is the textbook definition of ##\theta## in the formula you stated?
 
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  • #4
physicsmaster123 said:
I tried E =Fxcos0 but only ended up with 243kJ
What distance in the diagram is ##50\cos(8°)##m?
 
  • #5
Specific to this exercise, ##W=\Delta E_P## is a better fit than ##W=Fd\cos \theta##
 
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