unbalanced unbalanced for example if your light and your friend is on the other side and he is weigh heavier than you than its unbalanced. so if you are the same weight as your friend and you two go on a seasore it will be balanced.
friction is a force that when you rub anything on the right type of surface. as you can see if u slide across the snow you move but if you slide across the grass you go no where.
1. inside and outside forces acting on the bottle are eaqual.
normal shape.
2. hot. force acting on the force acting on the outside.
bottle bulges.
Gravity is a force that tries to pull us to the core of the earth. We see this when we kick a ball and it falls back to the earth.
Wednesday, 3 May 2017
Attempts to create helicopters can be traced back to Leonardo da Vinci, but the first working prototype helicopter, the VS-300, was invented by Igor Sikorsky in 1939. The next model he designed was the R-4 in 1942, which was the world's first mass produced helicopter.