Moderate -0.8 This is a straightforward projectile motion question requiring resolution of initial velocity into components, application of constant acceleration equations (v = u + at for vertical component), and Pythagoras to find resultant speed. It's a standard single-concept application with clear given values and a routine method, making it easier than average but not trivial since it requires multiple steps and understanding of vector components.
1 A particle is projected with speed \(17 \mathrm {~m} \mathrm {~s} ^ { - 1 }\) at an angle of \(50 ^ { \circ }\) above the horizontal from a point on horizontal ground. Calculate the speed of the particle 2 s after the instant of projection.
1 A particle is projected with speed $17 \mathrm {~m} \mathrm {~s} ^ { - 1 }$ at an angle of $50 ^ { \circ }$ above the horizontal from a point on horizontal ground. Calculate the speed of the particle 2 s after the instant of projection.
\hfill \mbox{\textit{CAIE M2 2011 Q1 [3]}}