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The rope of a swing is 3.30 m long. Calculate the angle from the vertical at which a 81.0 kg man must begin to swing in order to have the same KE at the bottom as a 1450 kg car moving at 1.53 m/s (3.42 mph).
2007-02-26 02:08:13 · 3 answers · asked by bud 1
2007-02-26 02:07:36 · 5 answers · asked by David B 1
Say you have a ball being hit from the same height with a 10 lb. versus a 20lb. weight (simulating a kick) would the distance it traveled being hit by the 20 lb. be two times the 10lb ? All other variables would be the same, I.E. controlled.
This is a followup as I apparentlly was not specific enough in the way I asked it earlier.
2007-02-26 01:52:16 · 3 answers · asked by lostsaylor 1
2007-02-26 01:37:27 · 1 answers · asked by Joseph 4
2007-02-26 00:46:55 · 10 answers · asked by jshreyasi 3
why is a boy driving a car with his girl friend seated next to him obtains more enjoyment from sharp right-hand turns than from turns to the left?
pls. elaborate when you answer....thanx.....
2007-02-26 00:21:33 · 2 answers · asked by clara y 1
Although the distinction between mass and weight may seem trivial on the surface of the earth, it can be a matter of life and death in space. Suppose a space station is being built in orbit around the earth. Astronauts building the station are moving huge girders into position in the space station.
are these girders weightless?
if they are weightless, are they any easier to move around in space than they would be on earth?
2007-02-26 00:21:07 · 4 answers · asked by clara y 1
2007-02-26 00:17:18 · 10 answers · asked by edward52 1
2007-02-26 00:07:43 · 7 answers · asked by clara y 1
2007-02-25 23:59:11 · 3 answers · asked by clara 1
2007-02-25 23:59:06 · 4 answers · asked by clara 1
I used to create mini submarines and place them inside clear glass bottles with water to make them float. Adding some weight carefully to achieve balanced buoyancy to make it stay at the middle is a challenge. To my surprise, to calibrate its buoyancy inside the bottle, I just twist the bottle cap tighter then it sunk slowly, and slacking the bottle cap twist makes it float, so i used the cap to float or sink the object accordingly. What is the real principle for this? I'm wondering of relative density or pressure makes it sink or float accordingly.
2007-02-25 23:57:21 · 4 answers · asked by Dosage 3
not just gravity but other non-contact forces like magnetism. how is it that the force is transmitted without a medium and without any dissipation? all creative answers are welcome.
2007-02-25 23:39:20 · 13 answers · asked by Anonymous
please answer this!!!i beg you,when is frictional force desirable and when does it become undesirable???
2007-02-25 23:19:45 · 4 answers · asked by einnarfix 1
2007-02-25 23:04:14 · 16 answers · asked by JOHN M 1
What topics do you suggest should i make a theoretical discussion/written report related to work and power? It should be interesting and worthy to read.
2007-02-25 22:57:53 · 7 answers · asked by Samlovesjesea 1
2007-02-25 22:46:02 · 4 answers · asked by Anonymous
i would like to reenact thomas young's double slit wave-particle experiment. what do i need to do this in my home? what...what kind of hazards am I getting into?
2007-02-25 22:14:47 · 5 answers · asked by hot_gal1991 1
iv heard about it being slowed down in certain mediums, can any one ellborate?
2007-02-25 22:14:03 · 10 answers · asked by Anonymous
I'm a latecomer to physics and I'm working through problems from text books. I understand the SUVAT equations as they are presented but some problems require me to turn the equation round (eg if v^2 = u^2 + 2at then t = ?)- I don't know how to do this and the worked examples just quickly show the altered equation - can someone help me? PLEASE
2007-02-25 21:15:09 · 1 answers · asked by Anonymous
2007-02-25 20:45:37 · 31 answers · asked by sir_real 2
In an electrical circuit, the number of electrons that are moving is called the amperage or the current, and it is measured in amps. The "pressure" pushing the electrons along is called the voltage and is measured in volts. So you might hear someone say, "If you spin this generator at 1,000 rpm, it can produce 1 amp at 6 volts." One amp is the number of electrons moving (1 amp physically means that 6.24 x 1018 electrons move through a wire every second), and the voltage is the amount of pressure behind those electrons
2007-02-25 20:41:55 · 2 answers · asked by PUBIC L 1
2007-02-25 20:05:12 · 9 answers · asked by Live & Let Live! 1
since clouds have the capacity to hold so much water ( many thousands of litres) how in the world do they manage to stay up there? and why do they appear white or grey just before it rains?
2007-02-25 19:38:06 · 7 answers · asked by Anonymous
1 why does a child in a wagon seems to fall backward when you give the wagon a sharp pull forward?
2 if you walk along a log floating on a lake, why does the log move in the opposite direction?
2007-02-25 19:23:23 · 6 answers · asked by Anonymous
which draws more current, a 100 W lightbulb or a 75 W bulb? which has higher resistance?
Please give explanation. Thank you!
2007-02-25 18:59:34 · 5 answers · asked by Billie 1
2007-02-25 18:55:05 · 4 answers · asked by Jaques S 1
2007-02-25 18:51:35 · 2 answers · asked by Lai Yu Zeng 4
E is the energy, h is planck's constant, what is f?????
2007-02-25 18:21:34 · 7 answers · asked by Boo Radley 4
2007-02-25 18:17:56 · 8 answers · asked by aliah_natasya2003 1
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