Mathematics 9709 · AS & A Level · Energy, work and power
Energy, work and power — practice question
A particle with mass $13\,\text{kg}$ lies on a rough plane inclined at an angle of $\theta$ to the horizontal, where $\tan \theta = \frac{5}{12}$. The coefficient of friction between the particle and the plane is $0.3$. A force of magnitude $T\,\text{N}$, acting parallel to the line of greatest slope, pulls the particle $2.5\,\text{m}$ up the plane at a constant speed.
(main)[5]
Determine the work done by this force.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “By resolving perpendicular to the plane, obtain the normal reaction, e.g. $R = 13g\cos22.6 = 120$” …