expression for work

Expression for Work - Let us take a ball that can slide along a frictionless wire, stretched along the horizontal X-axis. A constant force directed at an angle. f to the wire, accelerates the bead along the wire. According to Newton's second law F x = ma x ______(1) As the ball ..

. According to equation of motion v 2 = v 0 2 + 2 a x d ______(2) Substituting (1) in (2), we get Hence, the work done by the force on the ball is equal to the energy transfer. Work done due to the force is W = F x d. Therefore, to calculate work, we have to use only t..

Logarithmic Differentiation is obtained by taking log on both sides and then differentiating both sides. Differentiation of functions expressed in parametric f..

Potential difference is a measure of work done in moving a unit charge across a circuit. Current in a circuit is equal to the amount of charge flowing in one second. Therefore, the work done in moving 'Q' charges through a potential difference 'V' in a time 't' is given by ..

Consider an object of mass 'm', raised through a height 'h' above the earth's surface. The work done against gravity gets stored in the object as it's potential energy (gravitational potential energy). Therefore, potential energy = work done in raising the object through a heigh..

Consider an object of mass 'm' placed on the surface of the earth. According to Newton's law of gravitation, the gravitational pull of the earth on that object is given by Where F is the force of attraction between the earth and the object, M e is the mass of the earth and R e is the radius of the ..

Consider a body of mass 'm' which is initially at rest. When a force 'F' is applied on the body, let it start moving with a velocity 'V' and cover a distance 's'. The force produces acceleration 'a' in the body. The force 'F' does work when it moves the body through a distance 's' and thi..

A contractor wishes to lift a load of bricks from the sidewalk to the top of a building by means of a winch. Since we know the expression for work, we can calculate work to be done by the force applied by the winch to lift the load. We are interested in the rate ..

Power - A contractor wishes to lift a load of bricks from the sidewalk to the top of a building by means of a winch. Since we know the expression for work, we can calculate work to be done by the force applied by the winch to lift the load. We are interested in the rat..

You have come across some advertisements regarding job opportunities abroad for people from the field of information technology. You are disturbed at this trend of professionals working abroad and decide to write a letter to the Editor of a National daily expressing your views...