(i)[2]
Calculate the increase in gravitational potential energy of the particle.
(ii)[2]
The total work done against gravity and friction is $1146\,\text{J}$. Calculate the frictional force acting on the particle.
Mathematics 9709 · AS & A Level · Energy, work and power
Energy, work and power — practice question
A particle with mass $8\,\text{kg}$ is drawn, at constant speed, a distance of $20\,\text{m}$ along a rough plane that is inclined at an angle of $30^\circ$ to the horizontal by a force acting in the line of greatest slope.