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Old 03-03-2009, 03:54 PM   #21
SeanC
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Originally Posted by Euro-ignit3 View Post
Thanks for all your help...Physic is very hard to understand....Class just started and i really want to do well but right now, Im just hoping ill pass the class.
Np, see my edit though, I misread the question.
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Old 03-03-2009, 03:57 PM   #22
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Yes! So I DID get #3 right
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Old 03-03-2009, 03:58 PM   #23
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Yes! So I DID get #3 right
Yessir!
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Old 03-03-2009, 04:01 PM   #24
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Example in which an object can have zero acceleration and non-zero velocity: In every other instant when the stone in the first example is not at the top
Untrue. The stone is ALWAYS accelerating (ie, it is decelerating during it's upward travel, but accelerating in the direction of motion during it's downward travel). <------- EDIT: I noticed your edit

Any example with zero acceleration but non-zero velocity will involve either an exact balancing or complete lack of all external forces. SLVR JDM gave one example with the parachuter at terminal velocity (where F_drag counteracts F_gravity). Another similar example would be a car that has reached it's top speed. In the horizontal direction (the direction of travel), the drag from air resistance would exactly counteract the motive force provided by the tires, and the normal forces between the ground and tires would exactly counteract the gravitational forces acting on the car in the vertical direction. A third example could be an object traveling through deep outer space where gravity and drag are effectively non-existent. In all situations, there must be zero net forces in all directions.

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Old 03-03-2009, 04:03 PM   #25
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^Yep, I read "zero acceleration" as "non-zero acceleration", see my edit and post above.
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Old 03-03-2009, 04:03 PM   #26
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Yep im in college....this is just one of my GE class that i need to take. Never taken physic before.....

so the answer so be 1)E and 2)D what about 3?
What's your major?
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Old 03-03-2009, 04:05 PM   #27
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1.e
2.d

cngzsn, PhD in physics.

/thread
lol pwned
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Old 03-11-2009, 03:02 PM   #28
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Ok guys thanks for all your help....But i have 4 more questions:

How much impulse stops a 50-kg carton sliding at 4 m/s when it meets a rough surface? Conservation of momentum: mv(befor) = mv(after)

If a Mack truck and Ford Escort have a head on collision, which vehicle will experience the greater force of impact? the greater impluse? the greater change in momentum? the greater deceleration?

When a stationary uranium nucleus undergoes fission, it breaks into two unequal chunks that fly apart. What can you conclude about the momenta of the chunks? what can you conclude about the speed of the chunks?

Judy (mass 40.0 kg) standing on slippery ice, catches her leaping dog, Atti (mass 15kg), moving horizontally at 3.0 m/s. What is the speed of judy and her dog after the catch?
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Old 03-11-2009, 03:58 PM   #29
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^ ummm... That's gonna cost you
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Old 03-11-2009, 04:08 PM   #30
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Nevermind...figure out the answer...thanks!
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Old 03-11-2009, 04:30 PM   #31
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Nevermind...figure out the answer...thanks!
Don't lie. You asked on bimmerforums and got the answer from me

http://forums.bimmerforums.com/forum....php?t=1190934

Maybe I should stop doing your homework for you...
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Old 03-11-2009, 04:37 PM   #32
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Don't lie. You asked on bimmerforums and got the answer from me

http://forums.bimmerforums.com/forum....php?t=1190934

Maybe I should stop doing your homework for you...
Thanks for your help....
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Old 03-11-2009, 04:49 PM   #33
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Old 03-12-2009, 07:54 AM   #34
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wtf why does the skydiver have a weight of N? N is kgm/s^2 and its a unit of force not weight, the skydiver should have a mass of kg. Weight is mg, your professor is retarded.
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Old 03-12-2009, 12:10 PM   #35
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wtf why does the skydiver have a weight of N? N is kgm/s^2 and its a unit of force not weight, the skydiver should have a mass of kg. Weight is mg, your professor is retarded.
I think you are retarded. WEIGHT (=mass*g) is a FORCE (=mass*a), and both have the units of NEWTONS (kg*m/s^2), because both "g" and "a" have the units of acceleration (m/s^2). WEIGHT is not to be confused with MASS, which has the units of "kg" in SI (international system of units).
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Old 03-12-2009, 03:09 PM   #36
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F your PhD in the A you still lack basic reading comprehension. Clearly I started mass is kg and weight is mg. Yes you're right F=ma and g=a in freefall, so I'm stupid. You're smart. I was wrong. You were right. You're the best. I'm the worst. You're very good-looking. I'm not attractive. Want me to suck you off?
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Old 03-12-2009, 09:36 PM   #37
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F your PhD in the A you still lack basic reading comprehension. Clearly I started mass is kg and weight is mg. Yes you're right F=ma and g=a in freefall, so I'm stupid. You're smart. I was wrong. You were right. You're the best. I'm the worst. You're very good-looking. I'm not attractive. Want me to suck you off?
No I don't. Clearly.

Think twice before you comment on stuff like this with your half-knowledge, in fact, just don't comment at all.

Ford-pwned.

Dumb-a$$...
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Old 03-12-2009, 10:15 PM   #38
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Physics

srs bsns
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Old 03-12-2009, 11:06 PM   #39
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lol @ angry physics phd picking on 19 y/o with no physics course completions yet


get a life bro
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Old 03-12-2009, 11:19 PM   #40
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