Physics - October 2006

2006-10-29 14:23:36 · 9 answers · asked by Fasial M 1

Tarzan, whose mass is 95.0 kg, swings from a 3.10 m vine that is horizontal when he starts. At the bottom of his arc, he picks up 60.0 Jane in a perfectly inelastic collision. What is the height of the highest tree limb they can reach on their upward swing?

I believe I need to use both inelastic collision equation
m1v1i +m2v2i = (m1 + m2)vf
as well as conservation of energy
KEi + PEi = KEf + PEf
(1/2)mvi^2 + mghi = (1/2)mvf^2 mghf
My problem is that I'm not sure how to use the inelastic collision equation because if I assume Tarzan starts at rest then the left side is equal to 0 but if I assume he has an initial velocity then I wind up with two unknowns, v1i and vf.

2006-10-29 14:13:51 · 1 answers · asked by terpjenrose 1

Does the number of coils or the diameter affect "k" value (spring constant)

2006-10-29 14:10:59 · 2 answers · asked by Anonymous

2006-10-29 14:07:13 · 2 answers · asked by melo 1

A painter is high up on a ladder, painting a house, when unfortunately the ladder starts to fall over from the vertical.

Determine which is the less harmful action for the painter: to let go of the ladder right away and fall to the ground, or to hang on to the ladder all the way to the ground

2006-10-29 13:56:29 · 5 answers · asked by dookie cool the insomniac 1

2006-10-29 13:51:00 · 11 answers · asked by (: 2

A tower outside the Houses of Parliament in London has a famous clock commonly referred to as Big Ben, the name of its 13-ton chiming bell. The hour hand of each clock face is 2.7 m long and has a mass of 60.0 kg. Assume the hour hand to be a uniform rod attached at one end. (a) What is the torque on the clock mechanism due to the weight of one of the four hour hands when the clock strikes noon? The axis of rotation is perpendicular to a clock face and through the center of the clock. (b) What is the torque due to the weight of one hour hand about the same axis when the clock tolls 9 AM?


(a) 395 N·m; (b) 395 N·m
(a) 0; (b) 0
(a) 0; (b) 790 N·m
(a) 790 N·m; (b) 395 N·m
(a) 395 N·m; (b) 790 N·m

2006-10-29 13:48:43 · 1 answers · asked by L F 2

I'm writing a hypthesis for my science project backed up by research. I need to add more..but what? My proj.: Can you make two raw eggs float in a glass of salt and plain warm water? My hypothesis so far: My hypothesis is that the raw egg will float in a glass of salt water because salt water is thicker and denser than plain water. This is because the denser a liquid, the more buoyancy it provides for an object. You will float higher when swimming in salt water than in fresh water because salt water is denser. In physics, buoyancy is an upward force on an object immersed in a fluid (a liquid or a gas), enabling it to float or at least to appear lighter. Buoyancy is important for many vehicles such as boats, ships, balloons, and airships. The buoyancy of an object depends, therefore, only upon two factors: the object's volume, and the density of the surrounding fluid.

Thanks for your help! :)

2006-10-29 13:43:20 · 5 answers · asked by Aanchi11 2

I relly need this fast PLZ help!!

2006-10-29 13:24:06 · 2 answers · asked by Erika 1

a constant force Fa of a magnitude 82.0 N is applied to a 3.00kg shoe box at an angle phi = 53.0 degree, causing the box to move up in a frictionless ramp at constant speed. How much work is done on the box by Fa when the box has moved through vertical distance h= 0.150m?

2006-10-29 13:22:48 · 2 answers · asked by Galaxy D 2

A weight of 1200 N rests on a lever at a point 0.50 m from a support. On the same side of the support, at a distance of 3.0 m from it, an upward force with magnitude F is applied. Neglect the weight of the board itself. If the system is in equilibrium, what is F?

2006-10-29 13:08:09 · 4 answers · asked by Anonymous

When you turn a key to start a car, electrons migrate from positive battery terminal through the electric network to the starter motor and back to the negative battery terminal. Estimate the time this takes. (show me how you did it)

2006-10-29 13:07:24 · 3 answers · asked by OPrime 2

A rod being used as a lever is shown in the figure below . The fulcrum is 1.2 m from the load and 2.4 m from the applied force. If the load has a mass of 19.6 kg, what force must be applied to lift the load?

2006-10-29 13:07:09 · 3 answers · asked by Anonymous

i looked on yahoo and google...does anyone have a suggested webiste or even better the answer???

2006-10-29 13:00:53 · 1 answers · asked by shawnjordan14 2

2006-10-29 12:39:13 · 4 answers · asked by Timmy 1

2006-10-29 12:27:48 · 6 answers · asked by Cordell P 1

2006-10-29 12:23:49 · 7 answers · asked by x0x0x_lauren_luvs_u 2

IF remember "IF" time travel was possible would it be possible for someone to go back in time and kill their past self? for example "back to the future" the movie, if morty was to kill himself. i dont want an answers like "time travel is not possible" remember in this situation time travel is possible. if you can give me a decent answer as to why it would be possible or not possible you may consider yourself a genius or a freak which ever i choose. and in conclution i would like to say......"burst your head off thinking about this hahahahahaha!!!"

2006-10-29 12:18:45 · 19 answers · asked by i_need_help_fast 1

overhead at a velocity of 145km/h toward the north. What is the velocity of the wind that is affecting the plane?

2006-10-29 11:52:55 · 1 answers · asked by j a 1

caught 42.0m from the thrower, how long was it in the air? How high was the tallest spot in the ball's path?

2006-10-29 11:50:05 · 3 answers · asked by j a 1

This is related to force and work.

2006-10-29 11:17:09 · 11 answers · asked by Anonymous

The coin starts with an initial angular speed od 56.2 rad/s and rolls in a straight line without slipping. The acceleration of gravity is 9.8 m/s^2. How far does it roll up the inclined plane (answer in m)?

2006-10-29 11:07:01 · 1 answers · asked by Anonymous

It is rotating in the xy plane about the z axis passing through its center, perpendicular to its length. The mass of each oxygen atom is 2.66 x 10^-26 kg, and at room temperature, the average separation distance between the two oxygen atoms is
2.02 x 10^-10 m (atoms treated as point masses). if the angular speed of the molecule about the z axis is 5.61 x10^12 rad/s, what is the rotational kinetic energy (answer in J)?

2006-10-29 10:57:35 · 1 answers · asked by Anonymous

2006-10-29 10:56:31 · 2 answers · asked by John 1

A grindstone in the shape of a solid disk with diameter 0.520 m and a mass of 50.0 kg is rotating at 800 rev/min. You press an ax against the rim with a normal force of 160 N and the grindstone comes to rest in 8.50 s. Find the coefficient of kinetic friction between the ax and the grindstone.
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2006-10-29 10:44:53 · 1 answers · asked by cheezo12 1

2006-10-29 10:41:44 · 8 answers · asked by maggie 1

What would the electric field look like for a negatively charged object near a conducting sheet?
In other words, if I have a negatively charged pipe brough close to a piece of aluminum what would the field look like between these two objects?

2006-10-29 10:27:58 · 2 answers · asked by crazed1511 1

I am not saying this to be stupid or sound clueless but i'm not even out of highschool and have never heard the true reason. thanks if you could help.

2006-10-29 10:17:47 · 11 answers · asked by chynna cat sunflower 2

the mass of the baseball is 0.145 kg.
a) what are the baseball's acceleration?
b) what are the magnitude and direction of the force acting on it?
c) what is the magnitude and direction of the force acting on the player who cauight it?

2006-10-29 10:09:53 · 2 answers · asked by bhangra_di_rani2006 1

I am so clumsy. I fall all the time and wish I wouldnt! Im sick of it! It's so embarrassing. My boyfriend laughs at me all the time cause I fall over my own feet and sometimes the grass. I hate falling and he keeps making fun of me! I didn't think boyfriends were supolse to make fun of their girlfriends! Anyway, the other day in class, Im in 7th grade, I was walking up to the board and I tripped over nothing and hit my nose on the ground. Now I broke it, and it's so embarrasing. When I came home from school, my boyfriend picked me up in his car and he started cracking up so much at the bandage on my nose. How is it that some people can be so graceful and don't even try when people like me try so hard to be graceful but still fall? And how can I improve on my gracefullness?

2006-10-29 10:07:41 · 8 answers · asked by P!ATD GIRL! Luvn Brendon Urie! 3