The coefficient of kinetic friction between the mass and the incline is $\mu$. If the mass continues to slide down the incline at a constant speed, how much energy is dissipated by friction by the time the mass reaches the bottom of the incline?

- $\dfrac{mgh}{\mu}$
- $mgh$
- $\dfrac{\mu mgh}{\sin\theta}$
- $mgh\sin\theta$
- $0$

Solution :

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