The energy lost by the car on descent is 980×10⁴ J
We'll begin by calculating the energy of car at various heights.
At height 3000 m:
Mass (m) = 1000 Kg
Acceleration due to gravity (g) = 9.8 m/s²
Height (h) = 3000 m
Energy (E) =?
E = mgh
E = 1000 × 9.8 × 3000
E = 29400000 J
At height 2000 m:
Mass (m) = 1000 Kg
Acceleration due to gravity (g) = 9.8 m/s²
Height (h) = 2000 m
Energy (E) =?
E = mgh
E = 1000 × 9.8 × 2000
E = 19600000 J
Finally, we shall determine the the energy lost
Energy at 3000 m = 29400000 J
Energy at 2000 m = 19600000 J
Energy lost =?
Energy lost = Energy at 3000 m – Energy at 2000 m
Energy lost = 29400000 – 19600000
Energy lost = 980×10⁴ J
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