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mAKiTO
Colombia4177 Posts
problem reads: A crane lifts a 2000-kg mass upwards. if the tension in the cable is 20,000 N, what is the acceleration of the block? what I did is use a= f/m = 20000N/2000 kg = 10m/s square but the answer says its 0.2m/secs square I know that if I divided 2000N by 500 and get 400 and then 400N / 2000kg gives me 0.2m/sec square but i dont get why at all lol can someone plz explain this to me   | ||
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randombum
United States2378 Posts
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mAKiTO
Colombia4177 Posts
but then what do I do with that number? if I divide by 20000 i still dont get the answer... im really bad at this lol so dont laugh at me ._. | ||
IntoTheWow
is awesome32282 Posts
![[image loading]](http://i90.photobucket.com/albums/k255/IntoTheWow/asd-1.png) ![[image loading]](http://i90.photobucket.com/albums/k255/IntoTheWow/asd2.png) | ||
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Chromyne
Canada561 Posts
Fnet = T + Fg, where T = tension force and Fg is the force of gravity. Fnet = 20 000N + (-9.81m/s^2)(2000kg) Fnet = 380 N Find the acceleration of the block: F = ma 380 N = (2000kg)(a) a = 0.19 m/s^2 which is roughly 0.2 m/s^2. | ||
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mAKiTO
Colombia4177 Posts
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mAKiTO
Colombia4177 Posts
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IntoTheWow
is awesome32282 Posts
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Chill
Calgary26004 Posts
On September 23 2008 12:02 randombum wrote: Hi. My name is gravity, if you live on earth I pull you down with nearly constant acceleration of 9.8 m/s^2. In other words I exert 9.8 Newtons of force of on you for every kilogram you weigh. loool | ||
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Meta
United States6228 Posts
On September 23 2008 12:02 randombum wrote: Hi. My name is gravity, if you live on earth I pull you down with nearly constant acceleration of 9.8 m/s^2. In other words I exert 9.8 Newtons of force of on you for every kilogram you weigh. I wish I could have said this- thanks for making it funny =) | ||
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randombum
United States2378 Posts
On September 23 2008 12:57 Meta wrote: I wish I could have said this- thanks for making it funny =) I'm glad it was funny, but it would've been far better if he managed to get the answer from it. O well, he got the answer soon enough after anyways. | ||
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Grobyc
Canada18410 Posts
On September 23 2008 12:15 mAKiTO wrote: if i multiply the 2000kg by g it gives me 19600 but then what do I do with that number? if I divide by 20000 i still dont get the answer... im really bad at this lol so dont laugh at me ._. haw haw to you | ||
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Nitrogen
United States5345 Posts
On September 23 2008 12:18 IntoTheWow wrote: that's hot | ||
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capek
United States585 Posts
On September 23 2008 12:02 randombum wrote: Hi. My name is gravity, if you live on earth I pull you down with nearly constant acceleration of 9.8 m/s^2. In other words I exert 9.8 Newtons of force of on you for every kilogram you weigh. man. why do we need the LHC when we have you | ||
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