Question

what wil be the momentum when rocket lifts off​

Answer 1

Answer:

Before launch, the rocket is at rest on the launch pad, so its momentum is zero. When the rocket engines fire, burning gases are expelled from the back of the rocket.

Answer 2

Required Answer:

There are two forces acting on a rocket at the moment of lift-off:

• Thrust pushes the rocket upwards by pushing gases downwards in the opposite direction.

• Weight is the force due to gravity pulling the rocket downwards towards the centre of the Earth. For every kilogram of mass, there is 9.8 newtons (N) of weight.

As the rocket increases speed, there is a third force of drag that begins to increase. The resultant force is the sum of these individual forces.

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