Spring Balance Setup Analysis
The setup involves two spring balances, A and B, connected in series. Spring balance B is fixed to a rigid support. A force is applied to spring balance A. Crucially, both spring balances register the same reading.
Newton's Third Law Application
This observation directly relates to Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction.
- When spring balance A applies a force on spring balance B (action), spring balance B simultaneously exerts an equal and opposite force back on spring balance A (reaction).
- The rigid support ensures that B can exert this reaction force.
Equal Readings Interpretation
A spring balance measures the magnitude of the force (tension) acting on it.
- Since both spring balance A and spring balance B show the same reading, it confirms that the magnitude of the force exerted by A on B is equal to the magnitude of the force exerted by B on A.
- Newton's Third Law guarantees these forces are also opposite in direction.
Therefore, the observation indicates that the force exerted by A on B is equal in magnitude and opposite in direction to the force exerted by B on A.
Important Questions from Motion
An object is covering distance in direct proportion to the square of time elapsed. What conclusion can be drawn about the motion of the object?
If the distance time graph of the motion of an object is a straight line but not parallel to the time axis, then it may be concluded that the object is moving with a:
Which of the following changes when a body performs uniform circular motion?
Vehicles have treaded tires so that it_______.
If the initial velocity of an object thrown upwards is 14 m/s, then the time taken for the object to reach its highest point will be_______. (a = 9.8 m/s2)
