A crate of mass 30 kg rests on a rough horizontal floor. The coefficient of friction is 0.35. A force of magnitude P P\,P N acts at an angle of 18∘ 18^\circ\,18∘ above the horizontal. The crate is on the point of moving.
Find PPP. Take g=9.8g=9.8g=9.8 m s−2^{-2}−2.
136 exam-style questions on CCEA A Level Maths 2.3 Forces and Newton's laws, covering 2.3.1 Forces and Newton's laws, 2.3.2 Forces and Newton's laws, 2.3.3 Forces and Newton's laws, 2.3.4 Forces and Newton's laws, 2.3.5 Forces and Newton's laws, 2.3.6 Forces and Newton's laws, 2.3.7 Forces and Newton's laws, 2.3.8 Forces and Newton's laws, 2.3.9 Forces and Newton's laws, 2.3.10 Forces and Newton's laws, 2.3.11 Forces and Newton's laws, 2.3.12 Forces and Newton's laws, and 2.3 Forces and Newton's laws. Each one has a worked solution and a mark scheme showing where the marks go.