Question 20
Use g=9.8g = 9.8g=9.8 m s−2^{-2}−2.
Two particles AAA, of mass 2 kg, and BBB, of mass 3 kg, are connected by a light inextensible string which passes over a smooth pulley fixed at the top of a rough plane inclined at 40° 40°\,40° to the horizontal.
A A\,A lies on the plane with the string parallel to a line of greatest slope, and B B\,B hangs freely with the string vertical. When the system is released, A A\,A accelerates up the plane at 2 m s−2^{-2}−2.
a.[2]
Find the tension in the string.
b.[3]
Find the coefficient of friction between A A\,A and the plane.
c.[3]
Find the magnitude of the force exerted on the pulley by the string.
4.9 Forces and Newton's laws (A-level only) Questions
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.