science

4. Almost all daily activities involve force such as opening a can of food,_________ a switch and opening a door
6. Elastic force existwhen a material is _____________ or compressed
7. Force is a vector quantity that has _________ and direction
8. 1 kg equals to ________
11. Spring balance operates based on the principle of spring ________
13. Gravitational force causes all object that are thrown __________ to fall back to earth
16. The ________of an object is defined as gravitational force acting on it
17. Magnitude is the quantity or value of a _________
19. ________ force is produced when an object is in contact with a surface
20. Based on situation 1, a book that remains still on the tablee experiences gravitational force known as _________

1. Force is measured by ________
2. Based on situation 1, a reaction force called normal force will exist in the ___________ direction
3. Newton's third law states that there is a reaction force of the same ____________
5. Newton's third law stayes that for evry ______ force there is a reaction force
7. The aim for experiment 8.2 is to ________force
9. Force is a pull or a ________ upon an object
10. Gravitational force is the force that points towards the centre of the _______
12. What is the S.I unit for force
14. Force may exist in various forms such as gravitational force,normal force,frictional force,elastic force and ___________ force
15. What do we need to do with spring balance
18. Frictional force is the force that resist _____________ between two surfaces with each other