PDF chapter test TRY NOW
- Go out into the playground with four or five of your friends.
- Draw four circles of radii \(1\ m\), \(1.8\ m\), \(2.5\ m\) and \(3.8\ m\), all having a common centre.
- Ask one of your friends to stand in the centre and represent the Sun.
- Your other four friends may represent Mercury, Venus, Earth and Mars.
- Ask your friends to move around the Sun in anti-clockwise direction in their own orbits.
Students standing in a circle
Do they collide with one another?
, they with one another. Since planets move in their with one another.
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