o can jump the highest? And when you do jump you get that "light" sensation? Since I live in an apartment, I tend to feel this sensation a lot and I've always wondered why this was, until learning about dynamics. Your weight (or mass (kg) times gravity (m/s^2)) is equal to the normal force (or F sub N (N)) when on a solid, still surface. But, on an elevator this changes when going up or down. When traveling up floors, you tend to feel heavier because the normal force is greater than your weight (for a second). The normal force must be greater in order for the you to move up with the elevator. And when traveling down floors, you tend to feel lighter because the normal force is less than your weight (for a second). Your weight is greater because the floor is moves downward from under you quick enough that your weight doesnt move with it, therefore you are airborne for a split second. Now you know why this sensation occurs when you're in an elevator! :)Sunday, September 27, 2009
Elevator!
Have you ever played the game with your friends, when you're coming down the elevator, to see wh
o can jump the highest? And when you do jump you get that "light" sensation? Since I live in an apartment, I tend to feel this sensation a lot and I've always wondered why this was, until learning about dynamics. Your weight (or mass (kg) times gravity (m/s^2)) is equal to the normal force (or F sub N (N)) when on a solid, still surface. But, on an elevator this changes when going up or down. When traveling up floors, you tend to feel heavier because the normal force is greater than your weight (for a second). The normal force must be greater in order for the you to move up with the elevator. And when traveling down floors, you tend to feel lighter because the normal force is less than your weight (for a second). Your weight is greater because the floor is moves downward from under you quick enough that your weight doesnt move with it, therefore you are airborne for a split second. Now you know why this sensation occurs when you're in an elevator! :)
o can jump the highest? And when you do jump you get that "light" sensation? Since I live in an apartment, I tend to feel this sensation a lot and I've always wondered why this was, until learning about dynamics. Your weight (or mass (kg) times gravity (m/s^2)) is equal to the normal force (or F sub N (N)) when on a solid, still surface. But, on an elevator this changes when going up or down. When traveling up floors, you tend to feel heavier because the normal force is greater than your weight (for a second). The normal force must be greater in order for the you to move up with the elevator. And when traveling down floors, you tend to feel lighter because the normal force is less than your weight (for a second). Your weight is greater because the floor is moves downward from under you quick enough that your weight doesnt move with it, therefore you are airborne for a split second. Now you know why this sensation occurs when you're in an elevator! :)
Sunday, September 20, 2009
Physics so far..
This is
how i feel about phyiscs: calm and collected. I had no clue what I was getting myself into, signing up for AP Physics. I thought I was good at science (apparently only Bio and Chem) and so I grew a liking for it. And then this class came along; science is actually a challenge now. This picture shows how I am on the outside but on the inside, my thoughts are a mess. I do enjoy learning the material even though its killing my GPA. I'm going to do whatever it takes to get a satisfactory grade: I'm not going to drop! Even if it takes me sacrifcing my free, lunch period and after school time, I will do it. I feel that I am able to conquer Physics, I will have a successful academic background graduating this year. I'm not sure what's in store for me, but I'm up for whatever other challenges Phyiscs has for me!
how i feel about phyiscs: calm and collected. I had no clue what I was getting myself into, signing up for AP Physics. I thought I was good at science (apparently only Bio and Chem) and so I grew a liking for it. And then this class came along; science is actually a challenge now. This picture shows how I am on the outside but on the inside, my thoughts are a mess. I do enjoy learning the material even though its killing my GPA. I'm going to do whatever it takes to get a satisfactory grade: I'm not going to drop! Even if it takes me sacrifcing my free, lunch period and after school time, I will do it. I feel that I am able to conquer Physics, I will have a successful academic background graduating this year. I'm not sure what's in store for me, but I'm up for whatever other challenges Phyiscs has for me!
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