3. Concept of Gravity Force
Session 1: Experiments on gravity concept 1
Objective 1: Discuss the mental representation that your students have about gravity
Session 2: Experiments on gravity concept 2
Objective 1: to show that when an object is falling, it is subject to two forces: gravity and friction
Objective 2: to experiment the effect of gravity, the influence of the friction force has to be minimised
Session 3: Challenge : How to create a opposite force to gravity
Objective 1: How to generate a force that is opposite to gravity
Objective 2: Increasing friction force not in the air but in water
Session 4: Find the gravity center of an object
Objective 1: To understand that a two-dimensional object has a point of equilibrium.
