Explained Simply
Earth’s gravity pulls things downward, so rockets need great speed and energy to travel away from Earth.
Gravity pulls everything toward Earth. To travel far away, a rocket must gain enough speed and energy to overcome that pull. Escape velocity is the speed needed to break free from a planet’s gravity without more pushing.
Real rockets do not always reach escape velocity in one instant. Instead, they use carefully planned engine burns and orbits to travel where they need to go.
Did You Know?
The Moon has much weaker gravity than Earth, so escaping the Moon is much easier.