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:

If a part is constrained to move and heated, it will develop ____________________?

A. principal stress B. tensile stress C. compressive stress D. shear stress E. no stress...

The strain energy stored in a body due to suddenly applied load compared to when it is applied gradually is____________________?

A. same B. twice C. four times D. eight times E. half...

The co-efficient of friction depends upon _________________?

A. nature of surfaces B. area of contact C. shape of the surfaces D. ail of the above. E. A. and B. above...

The stress induced in a body due to suddenly applied load compared to when it is applied gradually is________________?

A. same B. half C. two times D. four times E. none of the above...

The Young’s modulus of a wire is defined as the stress which will increase the length of wire compared to its original length________________?

A. half B. same amount C. double D. one-fourth E. four times...