Question

What is force which causes rocket to take off​

Answer 1

A rocket launches when the force of thrust pushing it upwards is greater than the weight force due to gravity downwards. This unbalanced force causes a rocket to accelerate upwards. A rocket will continue to speed up as long as there is a resultant force upwards caused by the thrust of the rocket engine.

Answer 2

$\large\bf{\underline\orange{Answer \:↝}}$

What is force which causes rocket to take off?

→ This unbalanced force causes a rocket to accelerate upwards.