Particle A lies on the xy plane and is acted on by the three forces shown. Find the resultant of the three forces. Also find the direction cosines of the resultant.
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Particle A lies on the xy plane and is acted on by the three forces shown. Find the
resultant of the three forces. Also find the direction cosines of the resultant.
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- Express the Lagrangian for a free particle moving in a plane in a plane polar coordinates. From this proves that, in terms of radial and tangential components, the acceleration inpolar coordinates isa = (¨r − rθ˙2) er + (rθ¨ + 2 r˙ θ˙) eθ(where er and eθ are unit vectors in the positive radial and tangential directions).(a) Let F₁ = x² 2 and F₂ = x x + y ŷ + z 2. Calculate the divergence and curl of F₁ and F₂. Which one can be written as the gradient of a scalar? Find a scalar potential that does the job. Which one can be written as the curl of a vector? Find a suitable vector potential. (b) Show that the field F3 = yz î + zx ŷ + xy 2 can be written both as the gradient of a scalar and as the curl of a vector. Find scalar and vector potentials for this function.Two particles, each of mass m, are connected by a light inflexible string of length l. The string passes through a small smooth hole in the centre of a smooth horizontal table, so that one particle is below the table and the other can move on the surface of the table. Take the origin of the (plane) polar coordinates to be the hole, and describe the height of the lower particle by the coordinate z, measured downwards from the table surface. Here, the total force acting on the mass which is on the table is -T r^ (r hat). Why?
- à ở từ if a = 2.8i+ 5.7 j – 8.1k, = b = − 4.9î + 4.4ĵ + 3.8k, and What are (a) the x component, (b) the y component, and (c) the z component of 7 1.8î + 2.8ĵ + 4.6k . (d) Calculate the angle between and the positive z axis. (e) What is the component of a along the direction of b? (f) What is the magnitude of the component of a perpendicular to the direction of b but in the plane of a and b? =Two forces P and Q pass through a point A which is 4m to the right of 3m above a moment center 0. Force P is 200N directed up to the right at 30° with the horizontal and force Q is 100N directed up to the left at 60° with the horizontal. Determine the moment of the resultant of these two forces to 0.A stick of length L and mass M1 is in free space (no gravity) and not rotating. A point mass m2 hasinitial velocity v heading in a trajectory perpendicular to the stick. The mass has a perfectly inelasticallycollision a distance b from the center of the stick. Find the velocity of the center of mass and the finalangular velocity.
- A particle of mass m is located at x = 1, y = 0,2 = 2. Find the tensor of inertia for the particle relative to the origin. The particle rotates about the z axis through a small angle a <<1 as shown below. Show that the moments of inertia are unchanged to second order in a but the products of inertia can change linearly with a.is the vector foeld conservative? prove it.Find the divergence and curl of each of the following vector functions: 1. S = < xy, 2yz, 3zx > 2. E = < y^2, (2xy+z^2), 2yz >