Physics
A spring balance works on the principle of :
- gravitational force
- magnetic force
- restoring elastic force
- frictional force
Laws of Motion
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Answer
restoring elastic force
Reason — In a spring balance, a spring is fixed at one end with a hook attached to an object at the other end. When the spring is stretched, the spring exerts a force F opposite to the direction of displacement of its free end, the magnitude of this force is directly proportional to the magnitude of displacement. This force is restoring force.
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Related Questions
The magnitude of a non-contact force between two bodies …………… with an increase in their separation and …………… with a decrease in their separation.
- increases, decreases
- decreases, increases
- increases, increases
- decreases, decreases
On double the separation between two bodies the magnitude of the non-contact force between them becomes :
- one-eighth
- one-half
- one-fourth
- remains the same
A horizontal spring with two object A and B attached to its ends are shown in the figure below. If the spring is compressed, it …………… each object and if it is stretched, it …………… each object.
- pushes, pulls
- pulls, pushes
- pushes, pushes
- pulls, pulls
Define a contact force.