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प्रश्न
Give two examples of situations in which you push to change the state of motion of objects.
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उत्तर
- A heavy box at rest is pushed to move it from one room to another. This changes the state of motion of the box.
- A player pushes a football using his foot. This changes the state of motion of the ball.
संबंधित प्रश्न
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.
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.
What do you mean by the gravitational force? Give an example to illustrate it.
Match the following.
| Column A | Column B |
| 1. Non-contact forces | a. perpendicular to surface |
| 2. Catapult | b. an act of push or pull |
| 3. Force | c. unit of force |
| 4. Normal force | d. action-at-a-distance forces |
| 5. Newton | e. contact force |
Match the following.
| Column A | Column B |
| 1. Rolling friction | a. making grooved designs |
| 2. Static friction | b. regular oiling |
| 3. Reducing friction | c. a book placed on a tabletop |
| 4. Increasing Friction | d. wheels of a car |
______ is an ancient Indian astronomer.
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?
