Welcome to another issue of Physics Tips Daily - the free eZine to provide tips and tricks for students to survive and excel in physics.
Today's topic is about Mass vs Weight.
Although these two terms seem very similar, and they may even be used interchangeably, they are not the same things.
Mass is the amount of matter in an object. It's usually measured in kilograms. In the US, we aren't as familiar with that unit since we've stubbornly avoided the metric system. Usually, the amount of matter in an object doesn't change unless that object is physically altered somehow (cut into pieces).
Weight is a measure of the gravitational pull on an object. This is a force, thus its measured in Newtons. Again, this may seem like the same thing as mass. Here on the surface of the earth it is true that is something has more mass, it has more weight.
There are certain situations where the difference becomes obvious. Here is an example.
If an astronaut takes a very far journey into space, imagine that they are very far away from the earth or any other body. Here their mass is the same as it was on earth. However, the weight is now much less since they are far away from massive bodies that would gravitationally attract them. Thus, mass and weight aren't exactly the same thing.
That is the wrap for today.
Keep it up with your study. "See" you tomorrow.
Meanwhile, Seize the Day!
Wayne Huang, PhD
http://www.RapidLearningCenter.com
PS: Do you want to know my formula of success in physics? Knowing this formula could save you tons of time and avoid lots of frustration in studying physics. Are you ready? Here it is ...
>> Physics Mastery = Core-Concepts + Problem-Solving + Super Review.
There you have it! It's that simple - just identify and understand the core concepts and their inter-connections, then apply the understanding to problem solving and finally super study the cheat sheets. You will be able to walk in to ace that exam with total confidence. Watch this movie and learn about this secret formula: http://www.rapidlearningcenter.com/TheMovie.html
PPS: I guess your next question is "How?" well, I got that covered too. The short answer is "Physics in 24 Hours" series. The core concepts, problem solving and cheat sheets have all been worked out for you. Just click to start at: http://www.rapidlearningcenter.com/physics
Rapid Learning Center
27815 Ben Nevis Way
Yorba Linda, CA
92887
US
If you no longer wish to receive communication from us:
http://autocontactor.com/app/r.asp?ID=1085117357&ARID=181682&D=22
To update your contact information:
http://autocontactor.com/app/r.asp?c=1&ID=1085117357&D=22
No comments:
Post a Comment