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WORK, ENERGY AND POWER. A dot B) is defined as A.B = A B cos θ. (6.1a) where θ is the angle between the two vectors as shown in Fig. 6.1(a). Since A, B and cos θ are scalars, the dot product of A and B is a scalar quantity. Each vector, A and B, has a direction but their scalar product does not have a direction.
This video explains the work energy theorem and discusses how work done on an object increases the object’s KE.
(a) Work done by all forces on man is equal to the rise in potential energy mgL. (b) Work done by all forces on man is zero. (c) Work done by the gravitational force on man is mgL. (d) The reaction force from a step does not do work because the point of application of the force does not move while the force exists.
20 Ιουλ 2020 · This post is focused on Numerical Problems on Wor k, Energy, Powe r with solutions, and a problem worksheet for you. This is very useful for high school students studying Physics, more precisely for class 10 students of ICSE, CBSE, international boards like IGCSE, state boards, etc.)
Get solutions of ICSE Class 10 Concise Physics Selina Chapter 2: Work, Energy and Power. Clear your Physics doubts instantly & get more marks in Physics exam easily. Master the concepts with our detailed explanations & solutions.
Work-energy theorem. The net work done on an object causes a change in the object’s kinetic energy. This is known as the work-energy theorem. Wnet = Ekf - Eki where Eki is initial Ek and Ekf is final Ek The work-energy theorem applies to objects moving on horizontal & inclined planes, as well as frictionless & rough surfaces. Work energy theorem.
20 Σεπ 2021 · According to the work–energy theorem, the work done by a force on a moving body is equal to the increase in its kinetic energy. W = ½ mv 2 - ½ mu 2 = k f - k i W = Final kinetic energy – Initial kinetic energy
