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प्रश्न
What do you understand by the terms “balanced forces” and “unbalanced forces” ? Explain with examples.
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उत्तर
Balanced forces : If the resultant of all the forces acting on a body is zero, the forces are called balanced forces.
Example: When we push a concrete wall with our hands the wall doesn't move. This is because the force by us is balanced by the other forces acting on the wall.
Unbalanced force : If the resultant of all the forces acting on a body is not zero, the forces are called unbalanced force.
Example: If we push a toy car lying on the ground, we find that the toy car starts moving. This is because the force exerted by our hand is not balanced by the other forces acting on the toy car.
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संबंधित प्रश्न
Fill in the following blanks with suitable word :
If there were no unbalanced force of……………….. and no…………………. resistance, a moving bicycle would go on moving for ever.
Which of the two, balanced forces or unbalanced forces, can change the shape of an object ? Give an example to illustrate your answer.
What happens to the passengers travelling in a bus when the bus takes a sharp turn ? Give reasons for your answer.
What is the unit of force ?
Give one example where a force stops a moving body .
When we talk of a force acting on a body, it usually means :
If we release a magnet held in our hand, it falls to the ground. The force which makes the magnet fall down is an example of :
When a rubber balloon held between the hands is pressed, its shape changes. This happens because :
A fielder pulls his hands backwards after catching the cricket ball. This enables the fielder to :
Why does it happen?
If a stationary bus suddenly speeds up, passengers are thrown in the backward direction.
