Is energy a scalar or a vector quantity? Why?

Define kinetic energy.

What is mechanical energy?

Name the kind of energy stored in a stretched bow.

When the height of an object is increased, what happens to its potential energy?

State the law of conservation of energy.

What is the relationship between power, force and velocity?

Seema tried to push a heavy rock of $100 \mathrm{kg}$ for $200 \mathrm{s}$ but could not move it. Find the work done by Seema at the end of $200 \mathrm{s}$.