Advertisements
Advertisements
Question
Answer the following in detail.
Differentiate between contract and non-contract force. Support your answer with suitable examples.
Advertisements
Solution
| Contract force | Non-contact force | ||
| i) | These are forces that need a physical touch on the object to act upon it. | i) | These are forces that do not need physical contact to act on an object. |
| ii) | These may or may not be natural forces. | ii) | These are natural forces. |
| iii) | They cannot work from a distance. | iii) | They can work from a distance as well. |
| iv) | Its various types are applied to force, normal force, tension, frictional force. | iv) | Its various types are magnetic force, electrostatic force, gravitational force. |
| v) | Example: Player kicking a ball, game of tug-of-war, rolling ball stops, itself, horse pulling a cart, etc. | v) | Example: Magnet attracting iron nails, mango falling from a tree, charged plastic ruler attracts bits of dry-paper, etc. |
APPEARS IN
RELATED QUESTIONS
In the following situations identify the agent exerting the force and the object on which it acts. State the effect of the force in case.
Squeezing a piece of lemon between the fingers to extract its juice.
In the following situation identify the agent exerting the force and the object on which it acts. State the effect of the force in case.
An athlete making a high jump to clear the bar at a certain height.
Fill in the blank.
Force is applied as ........... or ..........
Match the following columns
| Column A | Column B |
| a) Non contact force | 1) repel |
| b) Like poles | 2) kg |
| c) Contact force | 3) gravitational force |
| d) Mass | 4) wear and tear |
| e) Weight | 5) force of friction |
| f) Friction | 6) kgf |
Explain the meaning of the term force.
Fill in the blank.
Magnetic force is a ................ force.
Can you identify whether it is push or pull that results in motion in the following cases?
 |
 |
 |
| Push / Pull | Push / Pull | Push / Pull |
 |
 |
 |
| Push / Pull | Push / Pull | Push / Pull |
______ is an ancient Indian astronomer.
A horse continues to apply force in order to move a cart with a constant speed. Explain why?
A truck of mass M is moved under a force F. If the truck is then loaded with an object equal to the mass of the truck and the driving force is halved, then how does the acceleration change?
