Moderate -0.3 This is a standard projectile motion problem requiring students to recognize that 'travelling horizontally' means vertical velocity is zero (at maximum height), then apply standard SUVAT equations. It's slightly easier than average because it's a direct application of well-practiced techniques with no problem-solving insight required, though the 5 marks indicate multiple calculation steps.
A small ball is projected with speed \(15 \text{ m s}^{-1}\) at an angle of \(60°\) above the horizontal. Find the distance from the point of projection of the ball at the instant when it is travelling horizontally. [5]
A small ball is projected with speed $15 \text{ m s}^{-1}$ at an angle of $60°$ above the horizontal. Find the distance from the point of projection of the ball at the instant when it is travelling horizontally. [5]
\hfill \mbox{\textit{CAIE M2 2017 Q1 [5]}}