A block of mass \( m \) is projected with speed \( v \) along the r...

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A block of mass \( m \) is projected with speed \( v \) along the rough surface of an inclined plane of height \( h \).
\( \mathrm{P} \) If block comes to rest at the top of the surface,

W then work done by friction force is
(1) \( -\frac{1}{2} m v^{2} \)
(2) \( m\left[g h-\frac{1}{2} v^{2}\right] \)
(3) \( -m g h \)
(4) \( m\left[g h+\frac{1}{2} \mathrm{v}^{2}\right] \)
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