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Posted by Suraj Roy 7 years, 10 months ago
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Posted by Jobanpreet Dhillon 7 years, 10 months ago
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Chandrashekhar Wankhede 7 years, 9 months ago
Sn = (n/2)(2a+(n-1)d)
S12= (12/2)(2a+(12-1)d)=12a+66d
Similarly
S8= (8/2)(2a+(8-1)d)= 8a+28d
S4= (4/2)(2a+(4-1)d) = 4a+6d
RHS = 3(S8-S4)= 3(8a+28d-4a-6d)
RHS =3(4a+22d) = 12a + 66d = LHS
Hence Proved
Posted by Shalu Kumari 7 years, 10 months ago
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Posted by Narendra Kumar 7 years, 10 months ago
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Amar Kumar 7 years, 11 months ago
Newton's laws of motion are three physical laws that, together, laid the foundation for classical mechanics. They describe the relationship between a body and the forces acting upon it, and its motion in response to those forces.
First law: In an inertial frame of reference, an object either remains at rest or continues to move at a constant velocity, unless acted upon by a force.
Second law: In an inertial reference frame, the vector sum of the forces F on an object is equal to the mass m of that object multiplied by the acceleration a of the object: F = ma. ( mass m is constant)
Third law: When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body.
Posted by Manoj Jonam 7 years, 11 months ago
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Posted by Adil Khan 7 years, 11 months ago
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Andrew Lalthasang 7 years, 11 months ago
Rajeev Malhotra 7 years, 11 months ago
yes. when a body is not in motion, it possess potential energy due to its position.
Posted by Adil Khan 7 years, 11 months ago
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Manoj Jonam 7 years, 11 months ago
Andrew Lalthasang 7 years, 11 months ago
Rajeev Malhotra 7 years, 11 months ago
The energy possessed by body due to its motion is called kinetic energy. K.E = {tex}mv^2/2{/tex}
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