# Recent content by ron_jay

1. ### Constraint relations

Referring to the diagram: The Perpendicular distance from the pulley to the axis of the ring is say a constant L. The part of the string that is being pulled (variable) is say y. The movement of the ring on the X-axis is also changing (variable) and we take it as x. Now, using the...
2. ### What is the formula of ellipse in 3D space

what about (x^2/a^2) + (y^2/b^2) + (z^2/c^2)=1 ? (intuitive) However, the equation of a circle in 3D is always defined by the equation of a sphere and the plane which cuts it. The sliced portion is the required circle. So it may be a similar case with the ellipse. Something like one half of a...
3. ### C/++/# Spiralling Algorithm in C++

This one is a little tricky because the numbering starts from the center. I have already figured out how to do this when the numbering starts from the top left hand corner (recursion) using "virtual motion analogy" (that's what I like to call it).However,looping with for or while is clumsy...
4. ### C/++/# Spiralling Algorithm in C++

Hey, I got an assignment to write and algorithm in C++ to print this pattern: 35 34 33 32 31 30 16 15 14 13 12 29 17 04 03 02 11 28 18 05 00 01 10 27 19 06 07 08 09 26 20 21 22 23 24 25 As you...
5. ### Projectile Motion of shot cannon ball

Yeh, the question is not very clear...when a golf ball is hit, its distance is naturally going to increase from the origin, then where does the maximum angle come in?
6. ### Tangent and normal acceleration, curvature radius

What exactly are the tangent and the normal accelerations of a projectile motion and how are they expressed mathematically? What is curvature radius? What is its expression? How is it derived ?
7. ### Doppler effect bat

At first the frequency received by the prey is: \nu' = \nu (\frac{v-v_{L}}{v-v_{S}}) Now, as you said correctly, the wave is reflected back and the the source and listener interchange to give us this i.e. the bat becomes the listener and the prey the source of the reflected sound wave...
8. ### Physics: doppler effect (observer & source in motion)

Is this what you get on simplifying the above equation? f'=f(\frac{v+v_{obs}}{v-v_{s}} ) Try not to apply the equation directly. Since, the frequency is received by the car at that moment t_{0} surely the sound wave of that frequency which we have to find out must have left some time...
9. ### Exercising Loop: Pattern

The first one is quite simple: Given the size of the array as 5, You have to put the "x" in the boundary of the square and on the right diagonal. condition for printing right diagonal: if(r==c){print "x"} condition for printing boundary: if(r-1==-1||r==n-1||c==0||c-1==-1){print "x"}...
10. ### Dopplers Effect Problem

Frequency of reflected wave: \nu'=\nu (\frac{v+v_{L}}{v}) Now, the source and listener interchange as the sound wave is reflected:(as received back by operator) \nu''=\nu'(\frac{v}{v-v_{L}}) \nu''=410 Hz \nu=400 Hz Plugging in the values we get 3m/s solving for...
11. ### Dopplers Effect Problem

Homework Statement 1. A car moves with a speed of 54km/h towards a cliff.The horn of the car emits a frequency of 400Hz at a speed of 335m/s (a)Find the wavelength of the sound emitted by the horn in front of the car (b)Find the wavelength of the wave reflected from the cliff (c)What...
12. ### Combination problem

Homework Statement A closet has 5 pairs of shoes. The number of ways in which 4 shoes can be chosen from it so that there will be no complete pair are? Homework Equations Permutation and Combination formulae The Attempt at a Solution I tried but couldn't figure it out anyway.
13. ### Equilibrium of Cylinder with two liquids at either side

Homework Statement (Please refer to the attachment given) In the figure shown, the heavy cylinder (radius R) resting on a smooth surface separates two liquids of densities 2\rho and 3\rho . The height h for the equilibrium of cylinder must be: a) \frac{3R}{2} b) R...
14. ### Atwood Machine Problem

Thank you very much for your help and support!
15. ### Atwood Machine Problem

Is this correct?