(i)[3]
Calculate how high the top of the post is above the ground.
(ii)[2]
Show that $B$ is at its greatest height $0.2\,\text{s}$ before it passes over the post.
Mathematics 9709 · AS & A Level · Representation of data
Representation of data — practice question
A small ball $B$ is launched from a point $O$ on horizontal ground with speed $12\,\text{m s}^{-1}$ at an angle of $30^\circ$ above the horizontal. After $0.8\,\text{s}$, $B$ is $0.5\,\text{m}$ vertically above the top of a vertical post.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Use $s=(12\sin30)\times0.8-\frac12 g(0.8)^2$ to find the vertical height of the object at the post's position” …
- Full mark scheme, point by point
- Step-by-step worked solution
- Write your answer & get it marked instantly by AI