What is the requirement for a force to come into play?
Interaction of one object with another object results in force between the objects. That is, interaction is the factor which is essential for force to act.
Define 'force'.
What is the magnitude of the resultant force when two forces act in same direction?
Match the following option:
| A. Contact force | (i) Non-contact force |
| B. Force | (ii) Force on unit area |
| C. Gravity | (iii) Push or Pull |
| D. Gravity | (iv) Muscular force |
| E. Pressure | (v) Strength of force |
Name the type of forces involved in the following :
(a) A ball launched in air hitting the ground
(b) A bicycle coming to rest when pedalling is stopped.
(c) A horse pulling a cart
(d) A plastic comb rubbed in dry hair picking up tiny pieces of paper
(e) A sticker attached on a refrigerator without glue
