Engineering Mechanics Which of the following statement is incorrect? A machine whose efficiency is 100% is known as an ideal machine The velocity ratio of a machine is the ratio of load lifted to the effort applied The ratio of the limiting friction to the normal reaction is called coefficient of friction A force acting in the opposite direction to the motion of the body is called force of friction A machine whose efficiency is 100% is known as an ideal machine The velocity ratio of a machine is the ratio of load lifted to the effort applied The ratio of the limiting friction to the normal reaction is called coefficient of friction A force acting in the opposite direction to the motion of the body is called force of friction ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The unit of angular acceleration is rad/s2 N-m m/s2 m/s rad/s2 N-m m/s2 m/s ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is None of these g/2 g/3 g/4 None of these g/2 g/3 g/4 ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics A particle moves along a straight line such that distance (x) traversed in 't' seconds is given by x = t² (t - 4), the acceleration of the particle will be given by the equation 6f - 8 6t² - 8t 3t² + 2t 6f - 4 6f - 8 6t² - 8t 3t² + 2t 6f - 4 ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through center of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.) IP = IG - Ah2 IP = Ah2 / IG IP = IG + Ah2 IP = IG / Ah2 IP = IG - Ah2 IP = Ah2 / IG IP = IG + Ah2 IP = IG / Ah2 ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The linear velocity of a body rotating at ω rad/s along a circular path of radius r is given by ω.r ω².r ω/r ω²/r ω.r ω².r ω/r ω²/r ANSWER DOWNLOAD EXAMIANS APP
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