Question

Very short answer type questions (1 mark each)
1. Is work a vector quantity?

2. What in the SI unit of work?

3. Name the physical quantities on which the amount of work done depends.

4. Give two examples of the objects having potential as well as kinetic energy

5. An object is thrown vertically upwards Whar is the kinetic energy of the body at the highest point of its motion?

6. The work done by a force is described by the caution wES cos : For which value of 0 is the work done maximum?

7.A body of mass m falls freely from a height. What will be its kinetic energy just betme it touches the ground?

8. What is the St unit of power? Define it.

9. A dry cell converts one form of energy into another Name the two forms. 10. Name the energy transformations taking place in the following cases

(a) an arrow released from a bow

(b) an electric fan

(c) an electric heater

(d) a stone falling from a building.


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Answer 1

Answer:

work is vector quantity

si unit of work is joule