Question

Write scientific reason.

The velocity of spacecraft at the earth's surface must be greater than the escape velocity of the earth.

Answer 1

1. The spacecraft must escape the earth’s gravitational force to travel into outer space.
2. To achieve this, the initial velocity of the moving object must be greater than the escape velocity of the earth.
3. To overcome Earth's gravity-induced slowdown, the spaceship must maintain a velocity greater than escape velocity. This lets the spaceship keep moving away from Earth without being dragged back.
4. If the initial velocity is insufficient, the spacecraft will fall to Earth or stay in low orbit. The spacecraft can reach orbit or deep space by surpassing the escape velocity.