Elements of astronautics: history and rocket motion
Answers are for parents and teachers.
1
A satellite’s period is 100 minutes; how many orbits a day (1440 : 100 ≈ 14, rounded)?
14
2
u = 3000 m/s, μ = 50 kg/s. F = ? N
150000
3
M₀ = 150 t, M₁ = 30 t. Ratio?
5
4
2026 – 1969 = ? (years since the Moon landing)
57
5
Why does a rocket work in vacuum, unlike a propeller that pushes against air?
A rocket gets momentum from the gas it expels – it needs no outside medium.