Question

- In your own words, explain potential energy, kinetic energy, conservation of energy and examples in daily life.

- In your own words, explain the definition of work in Physics.

- In your own words, explain Hooke's Law and elastic potential energy.

Answer 1

Potential energy -

Potential energy is the energy possessed by a body due to its position relative to other objects. Common type of potential energy includes gravitational potential energy of an object that depends on its mass and its distance from the center of mass of the other object. Example - a ball keeping at a height on a table possesses potential energy.

Kinetic energy -

The energy possessed by an object due to its motion is called the kinetic energy. Example - A van moving with a velocity possesses kinetic energy.

Conservation of energy -

Energy can neither be created nor destroyed. Only the form of energy can be changed. This means only one form of energy changes into the another form. Example - When a ball having some initial velocity reach to an height without any external force force applied, then the initial kinetic energy of the ball converts into the potential energy.

Work -

Work is defined in physics as a force causing the movement or displacement of an object. For example, when a ball is held above the ground and then dropped, the work is done on the ball as it falls is equal to the weight of the ball multiplied by the distance to the ground.

Hook's law -

Hook's law states that the force needed to extend or compress a spring by a distance X scales linearly with respect to that distance. This can be expressed mathematically as -

F = K*X

where, K is a constant factor called stiffness of the spring

X is the extension or compression in the spring

F is the required force.

Elastic potential energy -

Elastic potential energy is the potential energy stored as a result of deformation in an elastic objects, such as stretching of a spring.