Answer :
The energy lost due to friction and heat is 32784 Joule.
Given parameters:
Mass of the car; M = 120 kg.
speed of the car at bottom; v = 36 m/s.
Height of the hill; h = 94 m.
Then, Gain of Kinetic energy of the car = 1/2× mass × speed²
= 1/2×120×36² Joule
= 77760 Joule.
Loss of potential energy of the car = mass× acceleration due to gravity × height
= 120 × 9.8 × 94
= 110544 Joule.
Energy lost due to friction and heat = Loss of potential energy of the car - Gain of Kinetic energy of the car
= 110544 Joule - 77760 Joule.
= 32784 Joule.
Hence, energy lost due to friction and heat is 32784 Joule.
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