Children in KS2 will study forces such as gravity, thrust or friction. Whatever the force, it has either a push or a pull effect on objects around it. This is the second of three Science quizzes looking at the different types, and the effects, of these push and pull forces.
There are many types of force, such as thrust, magnetism and gravity. The famous scientist Galileo wanted to know whether gravity exerted the same force on all objects whatever their mass (the amount of matter an object contains). He dropped a cannonball and a small stone off the top of the tower of Pisa - and both hit the ground at the same time, showing that gravity always has the same force on all objects. Feathers only fall more slowly because of friction with the air. On the Moon a feather and a hammer fall at the same rate. Many people don't believe this until they try a similar experiment themselves.
See how much you know about gravity, friction and thrust by trying this quiz on the forces of push and pull.