Force
Force
In our everyday life, we observe that some efforts are required to put a stationary object into motion or to stop a moving object.
Force:
A pull or push over an object because of its interaction with other object is called force. For example:
1. To open a drawer, one has to pull it; and to close the drawer one has to push it. Thus, in both the conditions a person applies force by pull or push.
2. To kick a ball, one has to push it, i.e. a force is applied.
3. To ride a bicycle one has to push the pedal. In this condition, force is applied while pushing the pedal.
Direction and Magnitude of Force:
While plucking an apple from a tree we pull the apple towards ourselves. Hence we exert FORCE on that object. This also means that force has direction. Also, you push or pull an object gently or hard. This means force has a magnitude. Any action which causes pull, hit or push on a body is called force. Force cannot be seen but it can be judged only by the effects which it produces in various bodies around us.
The SI unit of force is Newton “N”.
Force can produce acceleration in the body on which it acts. When you apply the brakes in your bicycle, you are changing its velocity. Similarly, suppose you press the bulb of a dropper. You are producing a change in the shape of the bulb
State of Rest: An object is called in the state of rest when it is not moving. This means a stationary object is called in the state of rest. For example: a building, an electric pole, a ball kept over the ground and not moving, etc.
State of Motion: A moving object is called in the state of motion. For example – a moving car, a moving ball, etc. A force can speed up a moving object. Force can decrease the speed of a moving object. Force can stop a moving object. Force can change the direction of a moving object. Force can move a stationary object.
Which of the following are correct ? (a) To kick a ball, one has to push it, i.e. a force is applied. (b) When you apply the brakes in your bicycle, you are changing its velocity. (c) A moving object is said to be in the state of rest . | |||
| Right Option : A | |||
| View Explanation | |||
A fish is swimming upward at an angle of 30 with the hori-zontal. The direction of the force of gravity acting on it is | |||
| Right Option : B | |||
| View Explanation |
An object with mass 2 kg moves with a velocity of 10 m/s .What is the net force on the body? | |||
| Right Option : B | |||
| View Explanation | |||
Students / Parents Reviews [10]
It 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
10thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
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Prisha Gupta
8thAbout 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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Om Umang
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Hiya Gupta
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8thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
