Engineering Mechanics - Study Mode
[#201] The resultant of the two forces ‘P’ and ‘Q’ is ‘R’. If ‘Q’ is doubled, the new resultant is perpendicular to ‘P’. Then
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(B) Q = R
[#202] The moment of the force ‘P’ about ‘O’ as shown in the below figure is
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(C) P × OC
[#203] The total momentum of a system of masses (i. e. moving bodies) in any one direction remains constant, unless acted upon by an external force in that direction. This statement is called
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(D) Principle of conservation of momentum
[#204] The unit of force in S.I. system of units is
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(C) Newton
[#205] The Cartesian equation of trajectory is (where u = Velocity of projection, $$alpha $$ = Angle of projection and x, y = Co-ordinates of any point on the trajectory after t seconds.)
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(C) $${ ext{y}} = { ext{x}} an alpha - frac{{{ ext{g}}{{ ext{x}}^2}}}{{2{{ ext{u}}^2}{{cos }^2}alpha }}$$