Thursday, 28 June 2012

physics stuff just basic

let's talk about simple physics. gravity value is about 10m/s^2. should be 9.832 something but i just make it simple. stick to the value i learnt back in middle school.

so according to physics law, f=ma where force is equal to mass timed with acceleration. let say when a person weighing 60 kg falls. so the force will be 600N? the force is strong in this one. in other words, a man with that weight jumping down will produce a force of 600N. even if the height is increased let say he jumps from 14 storey building. the force will remain 600N. of course the latter will causes the man to SPLATTT when he hits the ground but the difference will mainly due to  work done i guess that goes by force time distance, wd = fd . since the distance is increased the the work done is also increased. then he becomes like a watermelon tossed to the wall. red stuffs all over the place. wait a second, is it because of the distance that really causes the man to crush or is it because of the sudden stop that the impact causes huge destruction? i mean if something fall slowly even from a high place it wont get destroyed right? try to reduce the gravity and you will be able to jump from a higher place without getting hurt. nvm, ill just think about this later.

so speaking of gravity, when two objects fall, they will fall with the same speed regardless of the mass. as an example, a feather and an elephant. lol i just want to try this test with these two subject. ohyeah this only works if there is no resistance like air resistance. so the higher the resistance the slower the object will fall. but whats the relativity with the mass again? dunno. forgot to ask my teacher back in school. so to end this post. heres a picture of a man on a rock falling (picture 1)... so will the result be like picture 2? can the act in pic 3 and 4 be done?

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