Engineering Mechanics A screw jack used for lifting the loads is None of these A reversible machine An ideal machine A non-reversible machine None of these A reversible machine An ideal machine A non-reversible machine ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The time of flight (t) of a projectile on an upward inclined plane is(where u = Velocity of projection, α = Angle of projection, and β = Inclination of the plane with the horizontal.) t = g cos β/2u sin (α + β) t = 2u sin (α - β)/g cos β t = 2u sin (α + β)/g cos β t = g cos β/2u sin (α - β) t = g cos β/2u sin (α + β) t = 2u sin (α - β)/g cos β t = 2u sin (α + β)/g cos β t = g cos β/2u sin (α - β) ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics When a body of mass 'm' attains a velocity 'v' from rest in time 't', then the kinetic energy of translation is 0.5 mgv2 mv2 0.5 mv2 mgv2 0.5 mgv2 mv2 0.5 mv2 mgv2 ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The algebraic sum of moments of the forces forming couple about any point in their plane is Both of above are wrong Both of above are correct Constant Equal to the moment of the couple Both of above are wrong Both of above are correct Constant Equal to the moment of the couple ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The forces which meet at one point, but their lines of action __________ on the same plane, are Known as non-coplanar concurrent forces. Do not lie Lie None of these Either A or B Do not lie Lie None of these Either A or B ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics Efficiency of a screw jack is given by (where α = Helix angle, and φ = Angle of friction.) tan(α + φ)/tanα tan(α - φ)/tanα None of these tanα/tan (α + φ) tan(α + φ)/tanα tan(α - φ)/tanα None of these tanα/tan (α + φ) ANSWER DOWNLOAD EXAMIANS APP
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