Question

1. Peter throws four stones having the same weight on four different surfaces. The surfaces aee icy, sandy, dry and cemented. He throws the stones with the dame force. On whoch of the given surfaces will the stone go to the maximum speed before it stops?

2. ____ is the body shape which offers very little resistance to the flow of air.

3. Spring balance is a device used for measuring the ______ of an object​

Answer 1

1. Icy

This is so because the icy surface will be slippery due to ice and water residue on it. Not only the stone, anything that goes on the icy surface is likely to slip. There won't be much friction offered by the surface.

If we talk about the sandy surface, the stone won't go far and will be stopped at the nearest point possible and it's also possible that the stone will settle down in the surface.

The dry and cemented surfaces will cause friction when the stone will be thrown on them, which will stop the stone from going far away.

2. Streamline is the body shape which offers very little resistance to the flow of air.

3. Spring balance is a device used for measuring weight of an object object.

(or the force acting on an object)