Final answer:
This hover thrust must be equal and (a) opposite to the force of gravity and therefore the forces are (b) balanced making the NET force on the spacecraft (c) zero .
The answer is (a)opposite, (b) balanced, (c)zero
Step-by-step explanation:
In order for an object to hover, the upward force of the hover thrust must be equal and opposite to the downward force of gravity. This ensures that the forces acting on the spacecraft are balanced, resulting in a net force of zero.
-- The hover thrust must be equal and opposite to the force of gravity. This means that the thrust generated by the spacecraft's propulsion system should be equal to the weight of the spacecraft due to gravity. This balance of forces allows the spacecraft to remain in a steady hover without rising or falling.
-- The forces are balanced because the hover thrust and the force of gravity are equal and opposite. When the hover thrust is equal to the force of gravity, the net force on the spacecraft is zero. This means that there is no overall force acting on the spacecraft in any particular direction. As a result, the spacecraft remains in a state of equilibrium and hovers in place.
It is important to note that the hover thrust should be precisely controlled to maintain this balance and prevent any unintended motion. By adjusting the hover thrust, the spacecraft can maneuver and change its position while still keeping the net force at zero.
The answer is (a)opposite, (b) balanced, (c)zero
Your question is incomplete, but most probably the full question was:
Fill in the blank (letter a,b and c):
This hover thrust must be equal and (a)________ to the force of gravity and therefore the forces are (b)________ making the NET force on the spacecraft (c)___________