PHYSICS: Why don’t things that are moving just keep moving? And then what happens to your applied force when you pull or push something at an angle?

Super important to remember – it’s not forces, but net forces that produce acceleration. So this means there are a couple of different ways to look at Fnet – a whole made up of parts and something that produces accelerations. Good stuff!

Another good reminder – you can find Ff a couple of different ways – it’ll be part of a net force equation and can be found from the coefficient of friction equation. If and ONLY if your object is moving at a constant velocity, Ff will equal Fa. Fn is only sometimes equal to Fw. If your object is pulled at any angle (or pushed), Fn will be a part of Fnet in the vertical direction.

Whew! 🙂

Photo by Antonia Lombardi on Unsplash

PHYSICS: So what changes motion? Here is our look at Newton’s 2nd law.

One of the most important things to remember – net forces produce acceleration. Now let’s see where you can take it!

flickr photo by kbaird

PHYSICS: Awesome job working through the woodpecker and Zorba problems today. Loved, loved, loved watching you brainstorming, collaborating, and applying information you’ve previously learned!!

Now…can you go and do the Zorba problem on your own?

flickr photo by Claudio Gennari

PHYSICS: Great work today thinking through these problems! How you look at problems from the beginning can make a huge difference – huh?

A couple of things that work for me when doing equilibrium, etc., problems – first, draw them. Then go back through and separate resultants into components. If an object is in equilibrium, then there are no net forces – all the forces in the x direction balance – everything left equals everything right, and all the forces up equal all the forces down.

You’ve got all the ammo you need, now go forth and conquer pumpkins! And Zorba!!

Answers for the Equilibrants II worksheet are below:

1. Fn = 3430 N upward against feet
2. Fn1 = Fn2 = 1890 N upward on each foot
3. F forward = 4.59 N
4. T1 = T2 = 1760 N
5. T1 = 1360 N and T2 = 680. N

flickr photo by Nomadic Lass

PHYSICS: So, how is the balance in your life? Here’s our discussion of net force, equilibrium, and equilibrants. Were you experiencing a little déjà vu? Great job today!

Image source phoenix.fanster.com/…/2009/08/tug-o-war1.jpg

PHYSICS: Remind me again why didn’t that pen go flying across the room instead of dropping into the bottle? Hmmm…..

So what do you reckon is the inertia of this car? Great start today relating mass to inertia! Now go forth and apply what you know to find the mass of your unknown!

Unsplash.com photo by Rodolfo Mari