Question

a moving car is brought to rest by applying brakes on level road choose correct statement
a) it violates law of conservation of energy as its kinetic energy is lost
b) it obeys laws of conservation of energy as its kinetic energy converted into heat and sound
c) it gains potential energy
d) none of these​

Answer 1

Answer:

b) It obeys laws of conservation of energy as the kinetic energy is converted to heat and sound energies

Explanation:

The answer to this is quite simple.

When we brake a moving car bringing it to rest, the kinetic energy of the car changes mainly into potential energy as the car comes to rest. However, not entirely the kinetic energy changes to potential energy but some part of the energy is degraded and dissipated in the form of sound energy which is the screeching sound of the car on applying the brakes and heat energy is generated due to the moving parts of the car. Hence, the energy is degraded to heat and sound energies.

Answer 2

Explanation:

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