What is gravity? Gravity is the force of attraction between two objects; it is not related to the object's mass
of attraction between two objects; it is related to the object's mass
that acts on objects when they are pushed
that repels objects that have like charge

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.

The man of mass m1 and the woman of mass m2 are standing on opposite ends of the platform of mass m0 which moves with negligible friction and is initially at rest with s = 0. the man and woman begin to approach each other. derive an expression for the displacement s of the platform when the two meet in terms of the displacement x1 of the man relative to the platform.

Why do different substances have diffrent properties