Advertisements
Advertisements
प्रश्न
Answer the following in detail.
Differentiate between contract and non-contract force. Support your answer with suitable examples.
Advertisements
उत्तर
| 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
संबंधित प्रश्न
To move a loaded trolley we have to ______ it.
An archer stretches her bow while taking aim at the target. She then releases the arrow, which begins to move towards the target. Based on this information fill up the gap in the following statement using the following terms.
While the arrow moves towards its target, the forces acting on it are due to ______ and that due to ______ of air.
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.
Taking out paste from a toothpaste tube.
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.
Select the correct alternative.
Friction is increased if
Name the term used for the push or pull?
What do you mean by the gravitational force? Give an example to illustrate it.
Fill in the blank.
Magnetic force is a ................ force.
State if the following statement is true or false. Correct the statement if it is false.
It is possible that a force applied to an object may not bring any change in it.
Answer the following in short.
Why is magnetic force considered as an action-at-a-distance force?
