A rocket with a lift-off mass 20,000 kg | Class 11 Physics Chapter Laws of Motion, Laws of Motion NCERT Solutions

Question:

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

Answer:

Mass of the rocket, m = 20,000 kg

Initial acceleration, a = 5 m/s2

Acceleration due to gravity, g = 10 m/s2

Using Newton’s second law of motion, the net force (thrust) acting on the rocket is given by the relation:

F – mg = ma

F = m (g + a)

= 20000 × (10 + 5)

= 20000 × 15 = 3 × 105 N


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Welcome to the NCERT Solutions for Class 11 Physics - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 9: A rocket with a lift-off mass 20,000 kg is blasted upwards with an initial acceleration of 5.0 m s&n....