Moderate -0.8 This is a straightforward kinematics problem requiring application of two SUVAT equations with constant acceleration. Students substitute given values (t=10, v=18, s=215) into s=ut+½at² and v=u+at to solve simultaneously for u and a. While it involves two unknowns, the method is standard and requires no problem-solving insight beyond selecting the appropriate equations.
10 seconds after passing a warning signal, a train is travelling at 18 m s\(^{-1}\) and has gone 215 m beyond the signal. Find the acceleration (assumed to be constant) of the train during the 10 seconds and its velocity as it passed the signal. [6]
10 seconds after passing a warning signal, a train is travelling at 18 m s$^{-1}$ and has gone 215 m beyond the signal. Find the acceleration (assumed to be constant) of the train during the 10 seconds and its velocity as it passed the signal. [6]
\hfill \mbox{\textit{Pre-U Pre-U 9794/3 2013 Q7 [6]}}