Determine the body weight of an astronaut, weighing 70 kg, moving in a rocket with an acceleration of 20 m / s2.

These tasks: m (the mass of the cosmonaut under consideration) = 70 kg; a (rocket acceleration) = 20 m / s2.

Constants: g (acceleration due to gravity) ≈ 10 m / s2.

To determine the body weight of the cosmonaut in question, we project all the acting forces onto the OY axis: m * a = N – Fт = P – m * g, whence P = m * a + m * g = m * (a + g).

Let’s make a calculation: P = 70 * (20 + 10) = 2.1 * 10 ^ 3 N or 2.1 kN.

Answer: The body weight of the astronaut in question is 2.1 kN.