A particle of mass 5 kg moves in a horizontal plane with acceleration (2i+j)(2\mathbf{i}+\mathbf{j})(2i+j) m s−2^{-2}−2. Three forces act on the particle. Two of them are 20i20\mathbf{i}20i N and 15(cos120° i+sin120° j)15(\cos120°\,\mathbf{i}+\sin120°\,\mathbf{j})15(cos120°i+sin120°j) N. The third force is P\mathbf{P}P.
Find P\mathbf{P}P in component form.
Find the magnitude and direction of P\mathbf{P}P.
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.