(iii) The work-energy theorem is always correct in the center-of-mass (CM) frame. (a) Yes (b) No (c) Only when the CM frame is an inertial frame. (iv) For a system of many particles, the total kinetic energy is always MV? /2, where M is the total mass of the system, and Vc is the velocity of the center-of-mass. (a) Yes (b) No (c) Only when the center-of-mass is moving. (v) For the motion of a rigid body, the internal forces have no effect on the linear momentum, angular momentum, and mechanical energy of the rigid body. (a) Yes (b) No (c) Depending on the form of the internal forces.
Theory and Design for Mechanical Measurements
Measurement is a term that refers to analyzing a manufactured component regarding the degree of accuracy for dimensions, tolerances, geometric profile, roundness, flatness, smoothness, etc. Measurement always involves comparing the manufactured component or the prototype with a standard specimen whose dimensions and other parameters are assumed to be perfect and do not undergo changes with respect to time.Precisely in mechanical engineering the branch that deals with the application of scientific principles for measurements is known as metrology. The domain of metrology in general deals with various measurements like mechanical, chemical, thermodynamic, physical, and biological measurements. In mechanical engineering, the measurements are limited to mechanical specific such as length, mass, surface profile, flatness, roundness, viscosity, heat transfer, etc.
Basic principles of engineering metrology
Metrology is described as the science of measurement, precision, and accuracy. In other words, it is a method of measurement based on units and predefined standards.
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