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प्रश्न
What do you understand by the terms “balanced forces” and “unbalanced forces” ? Explain with examples.
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
Name the unbalanced force which slows down a moving bicycle when we stop pedalling it.
State whether force is a scalar or a vector quantity?
Which of the two, balanced forces or unbalanced forces, can change the shape of an object ? Give an example to illustrate your answer.
Give reason for the following :
When a hanging carpet is beaten with a stick, the dust particles start coming out of it.
Explain why, it is dangerous to jump out of a moving bus.
Give one example where a force moves a stationary body.
What is the relationship between force and acceleration ?
A 1000 kg vehicle moving with a speed of 20 m/s is brought to rest in a distance of 50 metres :
(i) Find the acceleration.
(ii) Calculate the unbalanced force acting on the vehicle.
When we talk of a force acting on a body, it usually means :
Which of the following effect cannot be produced by an unbalanced force acting on a body?
