Skip to main content

भारतीय रसायन के पिता आचार्य प्रफुल्ल चंद्र रे की जयंती पर व्याख्यान का आयोजन

भारतीय रसायन के पिता आचार्य प्रफुल्ल चंद्र रे की जयंती पर व्याख्यान का आयोजन विज्ञान भारती उदयपुर इकाई एवं बीएन कॉलेज ऑफ फार्मेसी, बीएन विश्वविद्यालय के संयुक्त तत्वावधान में कार्यक्रम सम्पन्न उदयपुर, 2 अगस्त। भारतीय रसायन के पिता आचार्य प्रफुल्ल चंद्र रे की जयंती के अवसर पर विज्ञान भारती उदयपुर इकाई (चित्तौड़ प्रांत) एवं बीएन कॉलेज ऑफ फार्मेसी, बीएन विश्वविद्यालय के संयुक्त तत्वावधान में एक विशेष व्याख्यान का आयोजन किया गया। कार्यक्रम का उद्देश्य आचार्य पी.सी. रे के वैज्ञानिक योगदान एवं उनके देशभक्ति से ओतप्रोत जीवन पर प्रकाश डालना था। ज्ञातव्य है कि भारत की पहली फार्मा कंपनी आचार्य रे ने ही बंगाल केमिकल एंड फार्मास्यूटिकल्स लिमिटेड, कोलकाता में 1901 में प्रारंभ की थी। कार्यक्रम में विज्ञान भारती के उद्देश्य एवं गतिविधियों की जानकारी डॉ. अमित गुप्ता द्वारा दी गई। आचार्य पी.सी. रे के जीवन और कार्यों पर मुख्य व्याख्यान डॉ. लोकेश अग्रवाल द्वारा प्रस्तुत किया गया। उन्होंने बताया कि कैसे आचार्य रे ने विज्ञान को समाज की सेवा का माध्यम बनाया और रसायन विज्ञान में भारत को आत्मनिर्भर बनान...
Post a Comment

Newton’s second law | Mechanics

Newton’s second law 

  • According to this law the rate of change of momentum is directly proportional to the applied force, and the change in momentum is always takes place in the direction of applied force.
  • F ∝ (dp / dt)    ⇒    F = k (dp / dt)
  • Here F is applied force, p is linear momentum and k is constant of proportionality.
  • In S.I. k = 1
  • ∴   F = dp / dt
  • ∵   p = mv
  • ∴   F = d(mv) / dt    ⇒    F = m (dv / dt)    ⇒    F = ma    (∵ a = dv / dt)
  • Thus Newton’s second law gives the quantitative definition of force.
  • If ax, ay and az are the components of acceleration in x, y and z directions respectively, then
  • F = m (ax i + ay j + az k) = (max) i + (may) j + (maz) k
  • F = Fx i + Fy j + Fz k
  • Since Newton’s first and third laws can be derived from second law, and hence this law is the real law of motion or the most fundamental law of motion.
  • ∵     a = F / m
  • ∴     Acceleration ∝ 1 / Mass
  • It means greater is the mass of the body, smaller is the acceleration produced by it.
  • Since mass is the measure of inertia of the body, therefore the mass given by above equation is known as inertial mass.
  • Acceleration produced in the body depends only on its mass, not on the initial or final velocity.

Unit of force

  • Unit of force = Unit of mass × Unit of acceleration
                               = kg  ×  m/s2 = N (newton)
  • CGS unit of force is dyne
  • 1 N = 105 dyne

Dimensional formula

  • Dimension formula of force is [MLT-2]

Accelerated motion

  • If in a motion, only the magnitude of velocity of the body changes, then in this type of motion the force is applied either along the direction of motion or opposite to the direction of motion.
  • If only the direction of the motion of the body changes, then in this type of motion the force is always applied at right angles to the direction of motion of the body. Circular motion is the example of this type of motion.

To know more about Newton's second law of motion please click on https://youtu.be/ePtqiWUZEu0
Labels:

Comments

Post a Comment

Popular posts from this blog

Advanced Calculus | Mathematics | BSc

Advanced Calculus Advanced Differential Calculus, Integral Calculus and Vector Calculus Authors: Dr. Vimal Saraswat, Dr. Anil Kumar Menaria ISBN : 978-81-7906-950-9 Price: Rs. 375.00 Publisher: Himanshu Publications, Hiran Magri Udaipur; Himanshu Publications Prakash House, Ansari Road, New Delhi E-mail :  info@sacademy.co.in Phone:  +91 9664392614 To buy this book click on the link Advanced Calculus by Saraswat This book includes the following topics  Continuity Introduction Limit Left and right limit To find the R.H.L. and L.H.L. of a function Existence of limit)/li> Distinction between the value and limit of a function Some theorems based on limits Methods of finding the limit of functions Some standard limits Cauchy’s definition of continuity Continuity from left and right Continuity of a function in an interval Continuity in the open interval); Continuity in the closed in...
Post a Comment
Read more

B.N.U. First Semester Physics Syllabus

B.N. UNIVERSITY, UDAIPUR B.Sc. I Semester Physics PHYS MJ 111T: MECHANICS UNIT-I Laws of motion and Frame of reference: Laws of motion, conservation of momentum and energy, Co-ordinate frames, inertial and non-inertial frame of reference, Galilean transformation and invariance, fictitious force, centrifugal force, transformation of coordinate, velocity, acceleration and displacement in a rotating frame of reference, uniformly rotating frame of reference, Coriolis force, effect of centrifugal and Coriolis force due to earth’s rotation, Foucault’s pendulum. UNIT-II Gravitational Field and Potential: Newton’s universal law of gravitation, gravitational field intensity, gravitational potential due to spherical shell and solid sphere, gravitational potential energy, Laplace and Poisson’s equations, Gauss’s law, gravitational self-energy of a uniform sphere. Dynamics of System of Particles: Centre of mass, calculation of centre of mass of regular rigid bodies ...
Post a Comment
Read more

Constraints | Classification and Properties of constraints | Classical mechanics

Constraints and its classification Constraints force Constraints are restrictions that limit the motion of the particles of a system. Physically constrained motion is realized by the forces which arise when the object in motion is in contact with the constraining surfaces or curves. These forces are called constraint forces. Properties of constraints force They are elastic in nature and appear at the surface of contact. They are so strong that they barely allow the body under consideration to deviate even slightly from a prescribed path or surface. This prescribed path or surface is called a constraint. The effect of constraint force is to keep the constraint relations satisfied. Classification of constraints           Scleronomic and Rheonomic This classification is based on time. The constraints are said to be scleronomic constraints, if the constraint relations do not explicitly depend on time. But if the constraint rela...
Post a Comment
Read more