Engineering Mechanics MCQs

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

The velocity ratio for the third system of pulleys is

The moment of inertia of a thin spherical shell of mass m and radius r, about its diameter is

The resultant of two forces P and Q (such that P > Q) acting along the same straight line, but in opposite direction, is given by

The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (α) is

The maximum velocity of a particle moving with simple harmonic motion is

A body of mass m moving with a constant velocity v strikes another body of same mass m moving with same velocity but in opposite direction. The common velocity of both the bodies after collision is

The unit of power in S.I. units is

According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through centre 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.)