Mathematics 9709/42 — February/March 2019

Cambridge AS Level · Mechanics · worked solutions for every part, with the mark scheme

questions

marks

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Topics Forces and Equilibrium · Kinematics of Motion in a Straight Line · Energy, Work and Power · Newton's Laws of Motion

Q14MForces and EquilibriumFree sample

Fig. 1

A small ring $P$ of mass $0.03\text{ kg}$ is threaded on a rough vertical rod. A light inextensible string is attached to the ring and is pulled upwards at an angle of $15^{\circ}$ to the horizontal. The tension in the string is $2.5\text{ N}$ (see diagram). The ring is in limiting equilibrium and on the point of sliding up the rod. Find the coefficient of friction between the ring and the rod.

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6 more questions

Q2Kinematics of Motion in a Straight Line6M
Q3Forces and Equilibrium6M
Q4Energy, Work and Power · Forces and Equilibrium · Newton's Laws of Motion7M
Q5Kinematics of Motion in a Straight Line7M
Q6Kinematics of Motion in a Straight Line9M
Q7Forces and Equilibrium · Energy, Work and Power11M

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