Free Fall -- Resource

This video is about free fall; it includes a song and footage of falling to demonstrate the concept in real life. Free fall is when the only force acting on the falling object is the force of gravity, or 9.8m/s^2. No air resistance!

The pictures in the video are helpful to me. :)

Yeah I'm Freeeeeee, Free Faaaaallin'.

Okay, so this topic is a bit difficult. I've found it easy to imitate what a ball would do in my head. This resource video is just like what I imagine.

~ The ball goes up/down, and falls with a constant acceleration of approximately 10m/s^2. Don't forget to square the seconds in your answers for acceleration!
~ Each second, it's velocity gets bigger (down) or smaller (up) by 10m/s.
~ No air resistance, only the force of gravity!

(Using the formulas for vertical distance [d=1/2at^2] and [v=at]...and the formula for horizontal distance, [v=d/t], we can solve for any variable with enough information).

PROJECTILE MOTION IS THE SAME IDEA.
But....the object is now thrown up or horizontally instead of simply dropped. The initial velocity is not 0m/s anymore. Also, the time starts at 0s, not 1s.



I made up a (maxim, proverb, adage, etc.) today. It's like this: Each dime is 10 pennies. What would it look like to have a penny dropped from a cliff, with an initial velocity of 0m/s? Think of its motion in your head. Would it get faster? How long does it fall if the cliff is 80 meters high? Hmm....

CHEERS.

Newton's 2nd Law -- Resource

The resource I've chosen is a great example of Newton's 2nd Law of Motion. Though it's silly, the concept is simple and helpful. What we'll see in the video is an example of the force required to accelerate an object with more (and much more) mass.

The interactive video allows for a visual representation of Newton's 2nd Law rather than just projecting words on a screen.



This news report is interesting because it uses a soccer as the example. He says that the more mass an object has, a bigger force must be exerted to accelerate the ball.

The second ball he used was bigger. He said to the man that he should "accelerate [his] leg and create a bigger force."
The third ball was huge. "We don't know if [he] can create the force needed to move this much mass." (Mike). It was difficult to accelerate the ball with the bigger mass.

I hope this helps and gets you thinking and understanding Newton's 2nd Law of Motion!

CHEERS.