1. We can say that Galileo describe the motion and Newton explains the motion. Why?
2. When an object is in free fall the force acting on it is the gravitational force, which is perpendicular to the Earth surface. (a) What is the direction of the acceleration of gravity, (b) Why if the object moves as a projectile the X component of the velocity is constant and the Y component change at the same rate.
3. We can say that when any object is falling, the rate weight/mass for this object is constant. Why we can say that?
Skills: acting, velocity, physics