What speed does a rocket weighing 600g acquire? if combustion products weighing 15g.
| March 23, 2021 | education
What speed does a rocket weighing 600g acquire? if combustion products weighing 15g. fly out of it at a speed of 800m / s.
These tasks: m1 (rocket mass) = 600 g (in SI m1 = 0.6 kg); m2 (mass of combustion products) = 15 g (in SI m2 = 0.015 kg); V2 (exhaust velocity of combustion products) = 800 m / s.
The speed that a rocket can acquire can be determined using the law of conservation of momentum: m1 * V1 + m2 * V2 = 0 = (m1 + m2) * V1.2, whence V1 = m2 * V2 / m1.
Calculation: V1 = 0.015 * 800 / 0.6 = 12 / 0.6 = 20 m / s.
Answer: The rocket will be able to acquire a speed of 20 m / s.
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