Moderate -0.8 This is a straightforward projectile motion question requiring only basic kinematic equations. Students need to find horizontal and vertical velocity components after 2s (v_x = 12, v_y = gt = 19.6), then calculate the angle using tan θ = v_y/v_x. It's a single-step application of standard formulas with no problem-solving insight required, making it easier than average.
1 A particle is projected horizontally with speed \(12 \mathrm {~m} \mathrm {~s} ^ { - 1 }\) from the top of a high cliff. Find the direction of motion of the particle after 2 s .
1 A particle is projected horizontally with speed $12 \mathrm {~m} \mathrm {~s} ^ { - 1 }$ from the top of a high cliff. Find the direction of motion of the particle after 2 s .
\hfill \mbox{\textit{CAIE M2 2010 Q1 [3]}}