Artificial satellites of the Earth
Answers are for parents and teachers.
1
Write the formula for the first cosmic speed.
υ₁² = gR.
2
At 7 km/s, how many km does a satellite cover in 60 s?
420
3
Write the date of Gagarin’s flight and why it mattered, in two sentences.
On 12 April 1961 Gagarin became the first person in space and orbited the Earth once. It was humanity’s first step into space.
4
With an adult, find information in a book or website about Vladimir Dzhanibekov, a cosmonaut born in the Tashkent region, or the Uzbek cosmonaut Salizhan Sharipov.
Answers differ.
5
Why do we say astronauts in orbit are “weightless”?
They and the craft fall freely together, with no pressure on a support.