(i)[5]
Calculate the speed and direction of the ball's motion immediately before it strikes the ground.
(ii)[2]
Find the height of $O$ above the ground.
Mathematics 9709 · AS & A Level · Representation of data
Representation of data — practice question
A small ball $B$ is launched from a point $O$ above horizontal ground, with initial speed $15\,\text{m s}^{-1}$ at an angle of projection of $30^\circ$ above the horizontal (see diagram). The ball hits the ground $3\,\text{s}$ after projection.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Horizontal component $x' = 15\cos30$ and vertical component $y' = 15\sin30 - 3g$ (or the signs reversed)” …
- Full mark scheme, point by point
- Step-by-step worked solution
- Write your answer & get it marked instantly by AI