Analysis of Two Dimensional Projectile Motion

[accountbypass1]

The Galilean experiement virtually excluded the role of air resistance. A parachuting example, however, would take into account air resistance.

The heavier object will of course take a longer time to reach terminal velocity, because it exerts more force for air resistance to equalise (and air resistance is proportional to velocity/acc).

The small scale Galilean experiment is to the large scale parachuting example what Newtonian mechanics are to general relativity.

[lejink]

However, since A has twice the mass of B, it resists accelerating twice as much as B. These two effects - A has twice the force, but it resists twice as much - cancel each other out, and A has the same acceleration as B in free fall!

[lejink]

For an object in free fall, the net force on it equals its weight (the pull of gravity - the force exerted on it by the Earth) and its weight is proportional to its mass. In other words, if object A has twice the mass of object B, then A also weighs twice as much as B. If A weighs twice as much as B, then the Earth pulls on A twice as hard as it pulls on B, and the net force on A during free fall is twice as much as the net force on B.

[GALAX33Y]

THANX so much...

[F00dTube]

I'm sorry but you've got the forumulation wrong. It's mass not weight. They will have the same weight regardless of their mass. The meaning of weight in physics is a little bit different than in real life.

[canadiangurl523]

Awesome! I love it and your teacher does an awesome job... You as well with the slow-motion and little notes that you put on there. I love the explanations... and I agree!! Keep them coming!!

[n0vaca1n3]

keep em comin man