Conservations laws

Part A:
Energy is a conserved, substance-like quantity that is able to produce change. I learned the different way energy is stored and how it changes to become something else. We learned about kinetic, potential, and elastic potential energy and how to find them. We also figured out how to find work, which is a measure of the amount of change that a force produces. Also we learned about Power which is the rate which work is done. We learned how to make energy diagrams, with the energy of, kinetic, gravitational, elastic, and the energy to overcome friction. I have a difficult time using the work-energy theorem, just using and understanding it, i know its just the change of energy's but, just is confusing to me. To fix this problem i have to do more problems using this equations. Another thing i have found difficult was finding the elastic potential energy, same thing just need to do more problems involving it. My strength is in the bar graphs, finding kinetic and potential energy.

Part B:
Energy is in our everyday lives, when we drop a pencil or move something around. There is energy while people are walking and running. Every time someone turn a door handle or when someone picks up something. Energy is in our everyday lives in everything we do has some kind of energy to it.

How the Pulley on the Elevator Works?

Here is a Link becasue my Prezi on the blog is cut of:
Link To Prezi

Circular Motion and Gravitation

I learned about circular motion and gravitation. Circular motion is motion in a circle or radius, we learned how to find the frequency, velocity,centripetal acceleration and force of an object moving in a circle. Centripetal means directed towards the center of the circle.Objects moving in uniform circular motion will have a constant speed not a constant velocity, the magnitude of the velocity of a body on a uniform circular motion is constant and its direction is always changing.Next was universal gravitation, which is when the gravitational force varies inversely with the square of the distance between two objects. The law of Gravitation states that every object attracts each other. Last there is Gravitational Acceleration which is when the weight on the object on the Earths surface is equal to the gravitational force between that object and the Earth.

I found difficult when finding the Gravitational Acceleration and force is converting the km to m, and also the scientific notation messes me up a lot too. Finding the Circular motion has been a little difficult but I understand it.

My problem solving skills have gotten greater by thinking more outside the box when mixing the equations to find static friction or something. That had showed me that there is an answer its not just unsolvable. When I kept on thinking it kept on making more and more sense to me. I think I need to work on using scientific notations in problems.

Newtons Second Law

The acceleration a system experiences when acted upon by an unbalanced force. This shows the friction that an object experiences when moving. I learned about using my FBDs to calculate the sum of the forces, EFx and EFy, and putting them equal to ma or zero depending if the system is accelerating. I also learned about friction, called mu. This can be figured out from the equation Ff=mu*Fn. Mu is actually a naked number because it is newtons divided by newtons.

I have found finding the mu difficult because sometimes i will not remember the equation. Or finding things with not much information. Also what I found difficult was finding the tension in the string.

My problem solving skills are getting better from the other sections I am now understanding the concepts of the systems. Solving problems, doing classwork, and homework has gotten easier. But I have been a little lazy in my work, but i have started to pick it up on homework and classwork.

Newtons first law

Part A
I learned about newtons first law which is "An abject at rest tends to stay at rest and an abject in motion tends to stay in motion with the same speed and in the direction unless acted upon by an unbalanced force." I also learned how to draw Free body diagrams,calculate different types of forces like normal force and frictional force and some others. I also learned about equilibrium which is if the vector sum of the forces acting on the object is equal to zero.
The difficult part about this is trying to find the equation that fits with the free body diagram and calculating the forces is a little confusing. And the best part that I do very well id drawing free body diagrams.

Part B
The only connection that i can really make with this is inertia. Another is finding the normal force of an abject at rest or the frictional force of an object sliding on the ground.

Projectile motion video

There is a man who wants to jump and escape from the stairs and he needs to figure out how to get to the other side where the guy with the suit is.

Glogster on Projectile motion

Projectile Motion