Blocks A and B, of masses 2 kg and 3 kg respectively, are connected by a light inextensible string on a horizontal floor. The coefficients of friction for A and B are 0.2 and 0.1 respectively. A horizontal force of 20 N is applied to B away from A. The blocks move together. Take g=9.8g=9.8g=9.8 m s−2^{-2}−2.
Find the acceleration of the blocks.
Find the tension in the string.
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.