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Centre of Gravity
Every object has a spot that is called the centre of gravity. Try this experiment to find the centre of gravity of a ruler.
What You Need
What You Do
What You Need
- 30 cm ruler
- Masking tape
- Eraser
- Partner
What You Do
- Balance the ruler on your finger. (Move your finger right or left to find the spot where the ruler balances.) This spot is the ruler’s centre of gravity.
- Mark the centre of gravity with a small piece of masking tape. Write “3 cm” on the masking tape.
- Place an eraser 3 cm from the end of the ruler and tape it in place.
- Repeat steps 1 and 2. This time, mark the centre of gravity with a piece of masking tape with “6 cm” written on it.
Now Show What You Know!
Complete some questions about the reading selection by clicking “Begin Questions” below.
