Let an elastic spring of negligible small mass with its one end attached to a rigid support. Its other end is attached to a block of mass m which can slide over a smooth horizontal surface. The position x=0 is the equilibrium position. When the spring is stretched or compressed by pulling or pushing the […]
The potential energy of a body is defined as the energy possessed by the body by virtue of its position or configuration in some field. So, configuration of the system changes, then its potential energy changes. Example:- A body lying on the roof of a building has some potential energy, when allowed to fall down,
It state that work done by the net force acting on a body equal to the change produced in the kinetic energy of the body. Work Energy Theorem For A Constant Force When a force F acting on a body of mass m produces acceleration a in it. After covering distance s, let the velocity
The energy of a body is defined as it’s capacity or ability for doing work. Like work, energy is a scalar quantity having magnitude only but no direction. It’s dimensional formula is [ML²T⁻²]. It is measured in the same unit as work that is Joule in SI and erg in CGS system. Energy can exist
Conservative Force If the work done by the force in displacing an object depends only on the initial and final positions of the object and not on the nature of the path followed between the initial and final position, such a force is known as conservative force. Example:- Gravitational force is a conservative force Work
Let a variable force F acts on a body along the fixed direction x-axis. The magnitude of the force F depends on x. Let we have to calculate the work done when the body moves from the initial position (xi) to the final position (xf) under the force F. The displacement can be divided into
Work is a scalar quantity. It’s value may be positive, negative or even zero. (I) Positive Work If a force acting on a body has a component in the direction of the displacement, then the work done by the force is positive. Example:- When a horse pulls a card, the applied force and the displacement
Work Work is said to be done by a force, when the body is displaced actually through some distance in the direction of the applied force. Thus, work is done on the body only if the following two conditions are satisfied. (I) A force acts on the body. (II) The point of application of the
