A block of mass 5kg, which may be modelled as a particle, is on a smooth slope which is at an angle of 30 degrees to the horizontal. It is held in equilibrium by a fore P Newtons which is at 20 degrees to the horizontal.
It is the bit about 30 degrees to the horizontal I am confused about. I am used to questions where the angle given is relative to the slope. Could some help me please and give me a start with regards to the calculations.
Perhaps give a sketch as well please.
The question is ambiguous as to whether P is pushing down or up vertically.
Resolve horizontally and vertically,
where R is the normal reaction force.