Physics

Problem

5\,\text{kg}

block rests on a smooth plane inclined at

30^{\circ}

to the horizontal. Take

g = 9.8\,\text{m s}^{-2}

. Find the normal reaction exerted by the plane on the block. a)

25\,\text{N}

57\,\text{N}

42\,\text{N}

49\,\text{N}