Floating

1. READ/play the text
2. CLICK the picture (and video)
3. TRY this:

Q1: How would you show that something had buoyancy?

[Answer]

If you tie a brick to a forcemeter and then lower the brick into water, something extraordinary happens – the forcemeter reading goes down!

This means that a force must be acting upwards against the weight of the brick.

We call this force buoyancy. This is the force that lets you float in a swimming bath and that stops ships sinking.