A rocket weighing 20 tons takes off vertically upward with an acceleration of 7g.

A rocket weighing 20 tons takes off vertically upward with an acceleration of 7g. Calculate the thrust force of the rocket engines.

Initial data: m (rocket mass) = 20 t; a (the acceleration with which the rocket moves vertically upward) = 7g.

Reference data: g (acceleration due to gravity) = 9.81 m / s ^ 2.

SI system: m = 20 t = 20 * 10 ^ 3 kg.

The thrust force of the rocket engines can be calculated from the equality: m * a = F – Ft, whence F = ma + Ft = m * a + m * g = m * (a + g) = m * (7g + g) = m * 8g.

Let’s perform the calculation:

F = 20 * 10 ^ 3 * 8 * 9.81 = 1 569 600 N ≈ 1.57 MN.

Answer: The thrust force of the rocket engines is 1.57 MN.