Mathematics 9709 · AS & A Level · Representation of data

Representation of data — practice question

A small ball is launched at a speed of $16\,\text{m s}^{-1}$ at an angle of $45^\circ$ above the horizontal from a point on level ground.

(main)[4]

Calculate the length of time, before the ball hits the ground, during which the ball's speed is under $12\,\text{m s}^{-1}$.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Applies $v^2 = 12^2 - (16\cos45)^2$” …