1. Define the term work and derive its SI unit. Write an expression for the kinetic energy

of a body of mass m moving with a uniform speed v.

2. What are conservative and non-conservative forces? Give one example of each.

3. Define kinetic energy. Derive an expression for the kinetic energy of a body moving
with a uniform velocity.

4. Define the term potential energy, and derive its dimensions. Write an expression for
the gravitational potential energy of mass m raised to a height 'h' above the earth's
surface.

5. An elastic spring of force constant k is compressed by an amount x. Show that its

potential energy is 1/2kx².

6. State and prove work energy theorem.

7. Prove analytically that gravitational force is a conservative force.

8. State and prove the principle of conservation of mechanical energy.

9. Mention four properties of conservative forces.

10. What is the meaning of 'collision' in physics? Differentiate between elastic and in-
elastic collision. Give one example each.

11. Derive expressions for the velocities of two bodies in terms of initial velocities for
elastic one dimensional collision.

Conservative force:-The force which is applied for two way conversion i.e.,kinetic-potential is Conservative force

Non Conservative force:- The force which does not form two way conversion is  Non Conservative force

Work:-the product of Force and Displacement is called Work

SI Unit of work is newton m/s

Kinetic Energy:- The energy of a body by virtue of both position and motion is called Kinetic Energy K=1/2 mv²

Potential Energy :- The energy of a body by virtue of its position is Potential Energy=mgh(g=gravity)

afterwards i'll post answers

Conservative Forces:

As you saw when lifting a book, the work that you do "against gravity" in lifting is stored (somewhere... Physicists say that it is stored "in the gravitational field" or stored "in the Earth/book system".) and is available for kinetic energy of the book once you let go. Forces that store energy in this way are called conservative forces. Gravity is a conservative force, and there are many others. Elastic (Hooke's Law) forces, electric forces, etc. are conservative forces.

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Nonconservative Forces:

As you say when pushing a book, the work that you do "against friction" is apparently lost - it is certainly not available to the book as kinetic energy! Forces that do not store energy are called nonconservative or dissipative forces. Friction is a nonconservative force, and there are others. Any friction-type force, like air resistance, is a nonconservative force. The energy that it removes from the system is no longer available to the system for kinetic energy.

Of course, if energy is a "real thing," the energy taken away by a nonconservative force can't just disappear! I wonder where it goes....

conservative and non-conservative

hey

 plzz...prashanth...don't ask this much questions in first.....in meritnation...we can ask unlimited questions.......ask every question one by one

thankyou