True or false

. when the only force acting on a falling object is →air resistances←, the object is said to be in free fall.

. the property of matter that resists a change in motion is called →inertia←

. according to newton's second law of motion, →weight← depends on an object's mass and the net force acting on the object.

. friction depends on the types of surface involve and how →hard← the surface push together.

. mass and →air resistance← affect the gravitational attraction between objects.