LOM Flashcards
(10 cards)
A:- The centripetal force should not be regarded as yet another kind of force.
R:- In the second law of motion F=ma, F stands for the net force due to all material agencies external to the body, a is the effect of the force, ma should not be regarded as yet another force, besides F.
A:- अभिकेन्द्रीय बल को एक अन्य प्रकार का बल नहीं माना जाना चाहिए।
R:- गति के दूसरे नियम में F=ma, F का अर्थ है शरीर के बाहर सभी भौतिक एजेंसियों के कारण लगने वाला शुद्ध बल, a बल का प्रभाव है, ma को F के अलावा एक अन्य बल नहीं माना जाना चाहिए।
(1)
A:- A book at rest on a horizontal surface of table. It is subject to two external forces: the force due to gravity (i.e. it’s weight W) acting downwards and the upward force on the book by the table, the normal force R, R is self adjusting force.
R:- since W=R, forces cancal and therefore, the book is at rest.
A:- टेबल की क्षैतिज सतह पर एक किताब आराम की स्थिति में है। यह दो बाहरी बलों के अधीन है: गुरुत्वाकर्षण के कारण बल (यानी इसका वजन W) नीचे की ओर कार्य करता है और टेबल द्वारा पुस्तक पर ऊपर की ओर लगाया गया बल, सामान्य बल R, R स्व-समायोजित बल है।
R:- चूँकि W=R, बल रद्द हो जाते हैं और इसलिए, पुस्तक आराम की स्थिति में है।
(3)
Kyuki W=R balance hai psr fir bhi book ki gati ho sakti hai
A:- Force is not always in the direction of motion.
R:- In every situation, force is always parallel (samantar) to acceleration.
(2)
A:- An animate object such as human also requires an external force to accelerate.
R:- For applying the 2nd law of motion, there is no conceptual distinction between inanimate and animate objects.
A:- मनुष्य जैसी सजीव वस्तु को भी गति करने के लिए बाहरी बल की आवश्यकता होती है।
R:- गति के दूसरे नियम को लागू करने के लिए, निर्जीव और सजीव वस्तुओं के बीच कोई वैचारिक अंतर नहीं है।
(1)
A:- In uniform circular motion centripetal force is balanced by centrifugal force.
R:- In circular motion centripetal force act radially inward and centrifugal act radially outward in equal magnitude simultaneously.
(4)
A:- centripetal force ek inertial frame force hai or centrifugal ek non inertial frame force hai, isliye dono ek sath nhi lg sakte hai
R:- dono simultaneously nhi lgege, ek frame may ek hi force lgega, Lakin iske alwa baki Reason correct hai.
A:- A fixed force is applied for certain interval of time on two bodies of different masses, initially at rest, the lighter body picks up greater speed but after time interval t, both body acquire same momentum.
R:- Same force for the same time causes the same change in momentum for different bodies.
(1)
A:- The second law of motion is consistent with the first law of motion.
R:- Force is necessary for changing the direction of momentum, even if it’s magnitude is constant.
(2)
A:- if Fext=0 tab Pf=Pi yani object rest par to rest par hi rhega
A:- It is difficult to move a cycle along the road with its brakes on.
R:- Sliding friction is greater than rolling friction.
(1)
A:- It is difficult to move a cycle along the road with its brakes on.
R:- Sliding friction is greater than rolling friction.
(1)
A:- Buffers are provided between the bogies of a railway train.
R:- Due to buffel spring the time of impact between the bogies increases and the force acting between the bogies decreases.
(1)
