Use g=9.8g = 9.8g=9.8 m s−2^{-2}−2.
A particle of mass 8 kg hangs in equilibrium under the action of three forces: its weight, a force of magnitude P P\,P newtons acting at 30° 30°\,30° above the horizontal, and a force of magnitude Q Q\,Q newtons acting at 60° 60°\,60° above the horizontal on the opposite side of the vertical.
Find the value of P P\,P and the value of QQQ.
Show that the two applied forces are perpendicular, and verify your answers to part (a) using this fact.
106 exam-style questions on WJEC A Level Maths 4.9 Forces and Newton's laws (A-level only), covering 4.9.1 Forces and Newton's laws (A-level only), 4.9.2 Forces and Newton's laws (A-level only), 4.9.3 Forces and Newton's laws (A-level only), 4.9.4 Forces and Newton's laws (A-level only), and 4.9.5 Forces and Newton's laws (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.