A small block of mass of 0.1 kg lies on a fixed inclined plane PQ which makes an angle θ with the horizontal. A horizontal force of 1N acts on the block through its centre of mass as shown in the figure. The block remains stationary if (take g = 10 m/s2)

Engineering

Physics

Static and Kinetic Friction

Question

A small block of mass of 0.1 kg lies on a fixed inclined plane PQ which makes an angle θ with the horizontal. A horizontal force of 1N acts on the block through its centre of mass as shown in the figure. The block remains stationary if (take g = 10 m/s²)

$θ$ = 45°

$θ$ < 45° and a frictional force acts on the block towards Q

$θ$ > 45° and a frictional force acts on the block towards P

$θ$ > 45° and a frictional force acts on the block towards Q

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F_net = 1 cos $θ$ – 1 sin $θ$ ]