The effort required to lift a load W on a screw jack with helix angle a and angle of friction <j) is equal to _________________?

Related Mcqs:

The unit of work or energy in S.I. units is_______________?

A. newton B. pascal C. kilogram meter D. watt E. joule...

If n = number of members andy = number of joints, then for a perfect frame, n =_________________?

A. j-2 B. 2j-l C. 2/-3 D. 3/-2 E. 2/ -4...

Friction force for dry surfaces. Friction force is________________?

Pick up wrong statement? A. proportional to normal load between the surfaces B. dependent on the materials of contact surface C. proportional to velocity of sliding D. independent of the area of contact surfaces E. none of the above is wrong statement...

Center of percussion is___________________?

A. the point of C.G. B. the point of metacentre C. the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis D. point of suspension E. the point in a body about which it can rotate horizontally and oscillate under the influence of … Center of percussion is___________________?Read More...

The resultant of the following three couples 20 kg force, 0.5 m arm, $ ve sense 30 kg force, 1 m arm, – ve sense 40 kg force, 0.25 m arm, + ve sense having arm of 0.5 m will be__________________?

A. 20 kg, – ve sense B. 20 kg, + ve sense C. 10 kg, + ve sense D. 10 kg, – ve sense E. 45 kg, + ve sense...