Question

A 5000 kg rocket is set for vertical firing. The exhaust gases come down with a speed of 1000 ms. To give the rocket an upward acceleration of 20 ms, the amount of gas ejected per second to supply the needed up thrust is (g = 10ms-²).​

Answer 1

Answer:

physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy.