Science. experiments in water resistance

In our study of forces we have completed an investigation looking at water resistance. We used two plasticene spheres of exactly the same weight. We dropped them at exactly the same time into two identical containers, one was empty but the other contained water.

We found that the sphere dropped quicker in the empty container. The sphere in the water dropped more slowly because although gravity was pulling it down, water resistance acted against this force.

We then wondered what shape would be the most effective in travelling through the water.
We decided to try a cylinder and a cone.

We found that the cone reached the bottom first as the streamlined shape cut most effectivly through the
water resistance.