Video and lesson investigations on the topic of mass, weight and gravity. Key concepts include:
- Air resistance slows things down, but there is no air on the Moon.
- The force of gravity pulls all objects equally, regardless of their mass.
- Gravity is less on the Moon so things fall more slowly.
- On the Moon objects retain their mass but have less weight.
- The Moon has its own gravitational force, but the size of this is much smaller because the Moon is a smaller mass than the earth.
- The Moon’s gravitational pull is around one-sixth of that of Earth’s.
- Because the moon has no air at all there is no air resistance on falling objects. This is why the feather falls at the same rate as the hammer.
- The Moon has no atmosphere because its gravitational pull is so weak.