1. Derive the formula for work done by a constant force?
Dear Student!!
Answer 1.
A wooden block is kept on a table. When a force of magnitude F acts on the block, it gets displaced through a distance S in the direction of the applied force.
The magnitude of work done is given by the product of force (F) and displacement (S).
Let W be the work done on the block.
∴ Work = Force × Displacement
Answer 2.
There are many such kind of examples in which energy is possessed by a body due to its change in shape as,
Potential energy associated with the compression and expansion of spring.
Energy stored in the balloon when its compressed or being hit by an external force
Bending the bow etc.
Answer 3. Law of conservation of energy: Total energy of this universe is conserved (is constant). Energy cannot be created nor be destroyed. But can be transformed from one form to another.
For proof please refer the following link: https://www.meritnation.com/ask-answer/question/is-there-any-mathematical-proof-for-law-of-conservation-of-e/work-energy-and-power/1567032
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