Mathematics 9709/43 — May/June 2014

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

questions

marks

minutes

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

Q1Forces and EquilibriumFree sample

Fig. 1.1

A block $B$ of mass $7\text{ kg}$ is at rest on rough horizontal ground. A force of magnitude $X\text{ N}$ acts on $B$ at an angle of $15^{\circ}$ to the upward vertical (see diagram).

(i)

Given that $B$ is in equilibrium find, in terms of $X$ , the normal component of the force exerted on $B$ by the ground.

(ii)

The coefficient of friction between $B$ and the ground is $0.4$ . Find the value of $X$ for which $B$ is in limiting equilibrium.

The rest of this paper

6 more questions

Q2Newton's Laws of Motion · Energy, Work and Power5M
Q3Forces and Equilibrium6M
Q4Energy, Work and Power · Kinematics of Motion in a Straight Line7M
Q5Energy, Work and Power8M
Q6Kinematics of Motion in a Straight Line10M
Q7Newton's Laws of Motion · Kinematics of Motion in a Straight Line9M

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