A rocket with a lift-off mass 20,000 kg is blasted upwards with an ini

1.	A rocket with a lift-off mass 20,000 kg is blasted upwards with an initial acceleration of 5.0 ms-2.Calculate the initial thrust (force) of the blast.
Answer» Given m = 20000 kg a = 5ms^-2 (against gravity) since the rocket has to move upwards against gravity the total initial thrust of the blast is given by F = ma + mg = m (a + g) = 20000 (5 + 9.8) = 296 × 10⁵N.

A rocket with a lift-off mass 20,000 kg is blasted upwards with an initial acceleration of 5.0 ms-2.Calculate the initial thrust (force) of the blast.

Answer»

Given m = 20000 kg

a = 5ms^-2 (against gravity) since the rocket has to move upwards against gravity the total initial thrust of the blast is given by

F = ma + mg

= m (a + g) = 20000 (5 + 9.8)

= 296 × 10⁵N.