Centre of mass Definition and 215 Threads

A cubical container has been constructed from metal plate of uniform density and negligible thickness. The box has an edge length of 40 cm. Find the x, y, & z coordinates of the centre of mass of the box. Im guessing that the x and y coordinates are found by the symmetry..But how do i...

Well here are 5 questions from my text which I've tried doing but can't seem to twist my ahead around to figure them out. I don't know if it's due to the fact that I'm not applying the relevant concepts. Thanks for any help. (1). A uniform cord of length 25cm and mass 15g is initally stuck to...

Where is the centre of mass of a semicircular lamina which is uniform? I know it is somewhere along the line of symestry, but where excactly?:confused:

A puck of mass 80.0 g and radius 4.20 cm slides along an air table at a speed of 1.50 m/s. It makes a glancing collision with a second puck of radius 6.00 cm and mass 140.0 g (initially at rest) such that their rims just touch. Because their rims are coated with instant-acting glue, the pucks...

why is the concept centre of mass?

Many people believe that the Centre of Mass Theorem is a powerful and useful tool in Newtonian Mechanics. In fact it is a farce. (1) It is trivially true at distances in which the massive object is virtually a point-mass, such as between distant stars. (2) It is completely incoherent and...

heres another conceptual one . there is a standard yet very elegant problem about a rocket bllowing up mid air and finding the final postions of the parts of the projectile using the principle of centre of mass remaining the same since the forces a re internal when the rocket blows up . now...

Hello I was given a question of 2 masses m_a and m_b whos centres of L distance apart and are connected by a massless rod (so it kind of looks like a dumb-bell). Each ball through its centre has an axis perpendicular to the rod (axiz a and b respectively) and each has a moment of inertia...

Alright... I've been struggling with this derivation for QUITE some time, and I can't get a hold of my TA... so... I'm trying to derive the centre of mass of a truncated sphere. The final answer is cm= -(3h^2*(R-h/2)^2)/(4R^3-3Rh^2+h^3) Where R is the radius of the full sphere, and h is the...

A little question: as a planet (such as jupiter) orbits the sun, both the planet, and the sun orbit the same point of the centre of mass. how do you calculate where that centre of mass is? (2 body problem only) thanks DH

Can anyone help me with this question? A uniform solid cone of height b and base radius a stands on a horizontal table. Find an expression for the volume of the disc at height h above the base. Integrate over all the discs to show that the total volume, V, is given by V =pi/3 * b * a^2

Hiya! I'm confused, for my Physics A2 Coursework we're measuring g (gravitational field strength) and I don't know the centre of mass of the pendulum. Will this affect my experiment and/or results? Should I do something to overcome it? Please Help! Sam(antha) xx

:cry: Hey all... I'm having trouble deciding where the heck I should even start with this question. Soooo... here it is (I've attached a picture of the diagram because the question wouldn't make any sense without it). A non-uniform bar of weight W is suspended at rest in a horizontal...

Hi, I have a hard time trying to understand the Centre of Mass as well as the graphing for SHM. Please help. Thanks heaps.

Hi guys, I am exploring the notion that at the centre of all mass or intensities is a centre of absolute nothing. I won't go into why I am exploring this but the question that is of interests is : How can "nothing " be proved either in theory or by evidence except by default? And If...