A skateboarder with mass $45\,\text{kg}$ is positioned at the top of a ramp. Figure 2.1 illustrates the skateboarder and the ramp. The skateboarder moves vertically downward by $1.8\,\text{m}$. The gravitational field strength $g$ is $10\,\text{N kg}^{-1}$.
(a(i))[2]
Calculate the change in gravitational potential energy of the skateboarder.
(a(ii))[2]
State the names of two energy forms that increase as she descends.
(b(i))[1]
At the lowest point on the ramp, the skateboarder travels at constant speed along an arc that forms part of a vertical circle. State the direction of the resultant force on the skateboarder at this point.
(b(ii))[1]
State how the skateboarder's weight compares with the upward force exerted by the ramp on her.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Applies GPE = mgh” …