Chapter 15.1, Problem 8SSC

Interpretation Introduction

Interpretation:

The difference between kinetic and potential energy is to be explained using given examples.

Concept introduction:

Kinetic energy is stored in a body by virtue of its motion.

Potential energy is stored in a body by virtue of its position.

In a system total energy always remains conserved. One form of energy is converted to another form time to time.

Answer to Problem 8SSC

Two separated magnets have potential energy

An avalanche of snow involves conversion of potential energy to kinetic energy

Books on library shelves have potential energy

In mountain stream potential energy is converting to kinetic energy on going down the slope.

In stock-car race chemical potential energy is converting to kinetic energy

Separation of charges in a battery involves chemical potential energy

Explanation of Solution

Whenever a body comes into motion, energy stored in it is converted to kinetic energy.

Therefore, an avalanche of snow, in mountain stream, stock-car race, there is conversion of potential energy into kinetic energy.

Conclusion

Thus in total energy remains conserved.