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    Projectile Motion, package has to land on a moving ship after being droped from plane

    That's it, I'm putting down what I originally had as my answer: "Plane's do not drop packages. If this plane dropped the package, then the package would be destroyed." But, we could assume the package is dropped from an altitude of 900m?
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    Projectile Motion, package has to land on a moving ship after being droped from plane

    That's what I had thought as well, that the height of the plane was fixed. If i go with this approach, then the plane doesn't have two velocity components? Only one because the height is unchanging. Which would mean the package's velocity in the y component is due to gravity; it would be in...
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    Projectile Motion, package has to land on a moving ship after being droped from plane

    i think so, but originally i had thought the plane is constantly at an altitude of 900m
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    Projectile Motion, package has to land on a moving ship after being droped from plane

    I see what you are saying, in the initial velocity it gt is not involved, but AFTER it is dropped, yes. I think I have worked out a solution. Bare with me. 1. Vpack (y component) = Vplane*sinθ + gt 2. ((Vpack y)^2 - (Vpack nought y)^2)/(2g) = dy (altitude from which the package has to...
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    Projectile Motion, package has to land on a moving ship after being droped from plane

    @lewando, the x axis would be the distance's between the nose of the plane and the rear of the ship. The y axis would be the difference in altitudes. Okay, I drew a diagram the velocity of the plane is given but it has an x and v component. Vplane = 180 m/s Thus the intial velocity...
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    Projectile Motion, package has to land on a moving ship after being droped from plane

    Homework Statement A plane flies at 900m and has to deliver a package. It flies at 180 m/s North at 15° below the horizontal. The ships velocity is 40 m/s and it is travelling due north. At what horizontal distance from the ship must the package be dropped for it to land on the ship...
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    Deriving the Equation for Period of Simple Pendulum? Is my attempt correct?

    I have not come across any of the terminology you have just said. I doubt I would be allowed to use that method. Could you describe it in another way or comment on my attempt?
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    Deriving the Equation for Period of Simple Pendulum? Is my attempt correct?

    Homework Statement I have to derive an equation with the following variables: T= period m= mass Theta= angle l= length and I was told to think of the period as the perimeter of a circle. Homework Equations The Attempt at a Solution C=2\pi r,C/2=\pi r,d=\pi r,(at^2)/2=\pi...
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    Pulley but the cable is at an angle?

    In the diagram above, m1 = 285g, m2 = 755g, theta = 10.0 degrees, and mu = .047. If system is released from rest, how long does it take m2 to reach the end of table. Assum m1 can fall atleast 2.50 m.
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    Pulley but the cable is at an angle?

    I wish my PhD prof would realize this
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    Pulley but the cable is at an angle?

    http://img7.imageshack.us/img7/3597/doc092911.png [Broken] Alright, that is how I'm setting up the problem.
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    Pulley but the cable is at an angle?

    The tension (resultant and tension for the hanging box) was calculated using the weight of the hanging box. Also, I'm in a Trig based physics course and we CAN'T do derivatives, actually we're not supposed to.
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    Pulley but the cable is at an angle?

    I meant to say that the tension of the falling box is equal to the resultant tension of the sliding box. The tension in the x direction would be cos (10) * Tension of falling box.
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    Pulley but the cable is at an angle?

    Homework Statement http://img813.imageshack.us/img813/594/75309500.png [Broken] http://img813.imageshack.us/img813/7166/51848816.png [Broken] I have to find acceleration to calculate how long it takes the heavier box to reach the end of the table. Homework Equations The...
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    Rocket fires its engine, force/acceleration

    I haven't learned momentum yet, can't solve the problem using that method. Also, what direction is the rocket travelling in? Fey or Fe?
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    Rocket fires its engine, force/acceleration

    Homework Statement A small space probe of mass 235 kg is traveling at 85.0 m/s. It fires its main engine at an angle of 63.00 to its original direction of travel. The engine produces a thrust of 12,000 N and there is enough fuel on board for a 10.0 s burn. What distance will it have traveled...
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    Acceleration from Position vs Time^2 ?

    Homework Statement http://img824.imageshack.us/img824/6466/31231242.png [Broken] http://img835.imageshack.us/img835/5220/76022234.png [Broken] It's a free fall problem and I have to calculate a = g Homework Equations g = (2*(d-(vi * t)))/t^2 g = (2d)/t^2 The Attempt at a...
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    Math tricks for everyone

    came in here expecting 1+1 = 11 saw posts everything went better than expect :D
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    Quick Question (Epsilon/Delta Limit Proofs)

    Homework Statement [PLAIN]http://img641.imageshack.us/img641/2494/mathg.png [Broken] I've worked through it and at the 1st step I get: (1/-e+1)<x<(1/e+1) How do they have (1/e+1)<x<(1/-e+1)? Do you switch the signs of an inequality when you take the inverse of both sides?
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    Hyperbolic Sound Travel?

    Im guessing that c = the distance between A and B. a = the difference in time that the sound reaches the points b = what I need to find? I'm still unsure at how I'm reaching this conclusion, my book just says this is true and doesn't explain why.
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    Hyperbolic Sound Travel?

    i know the hyperbola equation and that c^2 = a^2 + b^2
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    Hyperbolic Sound Travel?

    Homework Statement Two recording devices are set 2400 feet apart, with the device at Point A to the west of the device at point B. At a point on a line between the devices, 400 feet from point B, a small amount of explosive is detonated. The recording devices record the time the sound...
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    Rotation of Axis and Hyperbolic Sound Travelling Word problem?

    Homework Statement 6x^2-6xy+14y^2-45=0 Two recording devices are set 2400 feet apart, with the device at Point A to the west of the device at point B. At a point on a line between the devices, 400 feet from point B, a small amount of explosive is detonated. The recording devices record...
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    Hardest Identity Evar involving sum and differences

    Homework Statement sin (x) + sin (3x) + sin (5x) + sin (7x) = 4cos(x)cos(2x)sin(4x) Homework Equations sin(a+b)=sin(a)cos(b)+sin(b)cos(a) sin(a-b)=sin(a)cos(b)-sin(b)cos(a) The Attempt at a Solution Me and four of my classmates have tried to do this proof and it kicked our ***...
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    Graphing with a ti 84

    Homework Statement If I graph an equation with my ti 84, is there anyway I can take the x values in the 2nd [table] spreadsheet of of x and y values and make the x values fractions? They're all decimals and I wan't them in fractions if possible. Can it be done? Homework Equations...
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    How does one Study ?

    The rest of the class IS STRUGGLING, there were 2 high grades (92) and everyone else had below a 75. The mode was a 50%. The professor is incredibly hard, reads powerpoints made by the book's author. I asked her once to explain how the product to sum and sum to product identities were derived...
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    How does one Study ?

    100+ views and no one knows how to study?
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    Impossible Bearing and Triangle word problem.

    Yea I knew that, that's obvious. But what do I do after? I can't use a 90* angle to solve trig functions can I?
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    Schools 1st Gen Minority College student, lost in a forest. Please HELP!

    I got accepted into the University of Pittsburgh and the costs came to around 35K (15K Tuition, 9K Room and Board, 1K for fees, 6K for meal plan, 4K for books and personal and travel expenses). I got 20K but I still came short by 15K. I'm currently working and studying hard in community...
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