ICSE Class 6 Answered
why do we say that force always acts in pairs, and what do we mean by consequential forces
Asked by Ritu | 06 Aug, 2016, 10:36: PM
Expert Answer
Force always acts in pairs:
- The best law to support the above theory is Newton's third law of motion.
- It states that ' to every action (force) there is an equal and opposite reaction (reactive force)'.
- This indicates that there is atleast one reaction to the applied force that makes a pair of forces.
Example:
- When we roll a ball down the hill, even though no one actually stops the ball, the ball ultimately stops rolling and comes to rest.
- This happens because the force of friction acts continuously against the motion of the ball and brings the ball to rest.
- Here the two forces acting in a pair were gravitational force (for pulling the ball down the hill) and frictional force (for bringing the ball to rest).
Consequential Forces:
- Consequential forces are the resultant force or an outcome of the force which is applied to the concerned body.
- The best example of a consequential force is frictional force.
- Frictional force arises due to a body which is moving or tends to move over another body, wherein both the bodies are in contact.
Answered by Abhijeet Mishra | 08 Aug, 2016, 12:48: PM