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People often say “For every action, there is an equivalent opposite reaction”. Here they meant ‘action of a human’. Is it correct to apply Newton’s third law to human actions? What is mean by ‘action

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प्रश्न

People often say “For every action, there is an equivalent opposite reaction”. Here they meant ‘action of a human’. Is it correct to apply Newton’s third law to human actions? What is mean by ‘action’ in Newton's third law? Give your arguments based on Newton’s laws.

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उत्तर

Newton’s third law is applicable to only human’s physical actions which involve physical force. The third law is not applicable to a human’s psychological actions or thoughts.

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पाठ 3: Laws of motion - Evaluation [पृष्ठ १६४]

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सामाचीर कलवी Physics - Volume 1 and 2 [English] Class 11 TN Board
पाठ 3 Laws of motion
Evaluation | Q IV. 13. | पृष्ठ १६४

संबंधित प्रश्‍न

Explain various types of friction.


State the empirical laws of static and kinetic friction.


Two masses m1 and m2 are connected with a string passing over a frictionless pulley fixed at the comer of the table as shown in the figure. The coefficient of static friction of mass mwith the table is µs Calculate the minimum mass m3 that may be placed on m1 to prevent it from sliding. Check if m1 = 15 kg, m2 = 10 kg, m3 = 25 and µs = 0.2.

 


Briefly explain ‘rolling friction.'


A heavy uniform chain lies on a horizontal table. If the coefficient of friction between the chain and the table is 0.25, then the maximum fraction of the length of the chain that can hang over one edge of the table is


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(g is acceleration due to gravity)


A uniform chain of length 3 metres and mass 3 kg overhangs a smooth table with 2 metres laying on the table. If k is the kinetic energy of the chain in joule as it completely slips off the table, then the value of k is ______.

(Take g = 10 m/s2)


The coefficient of static friction between a car's tires and a level road is 0.80. If the car is to be stopped in a maximum time of 3.0 s, its speed cannot exceed.


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[use g = 9.8 ms-2]


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