30 m/sec30 \mathrm{~m} / \mathrm{sec}30 m/sec
40 m/sec40 \mathrm{~m} / \mathrm{sec}40 m/sec
42 m/sec42 \mathrm{~m} / \mathrm{sec}42 m/sec
45 m/sec45 \mathrm{~m} / \mathrm{sec}45 m/sec
