1.5 m/sec21.5 \mathrm{~m} / \mathrm{sec}^{2}1.5 m/sec2
2 m/sec22 \mathrm{~m} / \mathrm{sec}^{2}2 m/sec2
3 m/sec23 \mathrm{~m} / \mathrm{sec}^{2}3 m/sec2
2.5 m/sec22.5 \mathrm{~m} / \mathrm{sec}^{2}2.5 m/sec2