Inertia
Inertia
A body can not change its state of rest or uniform motion unless an unbalanced force is applied on it. The inability of a body to change on its own its state of rest or uniform motion is known as inertia. It is an inherent property of all objects. Inertia of an object is measured by its mass. Inertia is directly proportional to the mass. It means that inertia increases with increase in mass and decreases with decreases in mass. A heavy object will have more inertia than a lighter object. For example:
1. Inertia at Rest:
If we keep a body at rest, it remains there for any length of time if no force is applied on it, is called inertia of rest. It may also be defined as the tendency of the body to oppose any change in state of rest.
Examples:
(i) Jerks while travelling: When we stand in a bus and the bus starts suddenly, we tend to fall backward. This is because our feet are in contact with the floor of the bus and the friction at the contact is high. This force does not allow the feet slip on the floor. The feet move forward with the floor. The upper body does not feel the forward force immediately and remains at rest for a while. So, the upper part of our body gets jerked backward.
Similarly, when the bus stops suddenly, the feet come to rest immediately, but the upper body continues to move in forward direction. So, we tend to fall forward.
(ii) Card Coin Experiment: Place a coin a smooth card kept on a glass as shown. Flick the card sharply in the horizontal direction. The card flies away and coin drops into the glass.
A and B are two objects with masses 8 kg and 32 kg respectively.then, | |||
| Right Option : B | |||
| View Explanation | |||
When we stand in a bus and the bus starts suddenly, we tend to fall ___________ | |||
| Right Option : B | |||
| View Explanation | |||
Which of the following are correct ? (a) The inability of a body to change on its own its state of rest or uniform motion is known as inertia. (b) If we keep a body at rest, it remains there for any length of time if no force is applied on it, is called inertia of rest. (c) The tendency of the body to continue in the same direction until some unbalanced force is applied on it is called as inertia of motion . | |||
| Right Option : A | |||
| View Explanation | |||
Students / Parents Reviews [20]
About Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
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Hiya Gupta
8thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
Shreya Shrivastava
8thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
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Yogansh Nyasi
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Ayan Ghosh
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Hridey Preet
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Eshan Arora
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Archit Segal
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Yatharthi Sharma
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Ayan Ghosh
8thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
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Aman Kumar Shrivastava
10thMy experience with Abhyas Academy has been very good. When I was not in Abhyas whenever teacher ask questions I could not speak it confidently but when I came in Abhyas, my speaking skills developed and now I am the first one to give the answer of teachers question.
Upmanyu Sharma
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