Action and reaction – Clip

The transcript discusses the Voyager spacecraft, launched in 1977, which continues its journey through space. It explains how, once free from Earth's gravitational pull, the spacecraft requires minimal force to move due to the absence of air resistance in space's vacuum.

In which year did the spacecraft begin its journey?

• 1985

• 1977

• 1969

• 1999

What happens to a spacecraft once it leaves Earth's gravitational influence?

• It stops moving

• It falls back to Earth

• It requires a lot of force to keep moving

• It needs very little force to keep moving

Why does the spacecraft need minimal force to continue its journey in space?

• Because there is no air resistance

• Due to the presence of air resistance

• Because of strong winds

• Due to Earth's magnetic field

What is the main factor that allows the spacecraft to keep moving in space?

• Solar winds

• Space debris

• Lack of air resistance

• Earth's gravity

What is the effect of the vacuum of space on the spacecraft's motion?

• It allows the spacecraft to move with minimal force

• It has no effect

• It speeds up the spacecraft

• It slows down the spacecraft