1 A rticle \(P\) is p j ected rticallyw ard with \(\mathbf { p }\) ed \(\mathrm { ms } ^ { - 1 }\) frm a \(\dot { \mathrm { p } } \mathrm { n } \mathbf { d }\) b gd
- Fid b g eatest b in a th gd each dy \(P\).
- Fid \(\mathbf { b }\) to al time frm \(\mathrm { p } \dot { \mathrm { p } }\) ectim il \(P\) retu \(\mathbf { B }\) to \(\mathbf { b } \mathbf { g d }\)