(9.8)2 m(9.8)^{2} \mathrm{~m}(9.8)2 m
19.6 m19.6 \mathrm{~m}19.6 m
9.8 m9.8 \mathrm{~m}9.8 m
4.9 m4.9 \mathrm{~m}4.9 m