A. r/2
B. r/A
C. r/%
D. 0.134 r
E. 3r/8
Related Mcqs:
- Dynamic friction as compared to static friction is __________________?
A. same
B. more
C. less
D. may be less of more depending on nature of surfaces and velocity
E. has no correlation - Coulomb friction is the friction between_____________________?
A. bodies having relative motion
B. two dry surfaces
C. two lubricated surfaces
D. solids and liquids
E. electrically charged particles - The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is________________?
A. same
B. double
C. half
D. four times
E. one fourth - A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly_______________?
A. 38 m
B. 62.5 m
C. 96 m
D. 124 m
E. 240 m - A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to_________________?
A. 25
B. 50
C. 100
D. 250
E. 500 - 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 effort required to lift a load W on a screw jack with helix angle a and angle of friction <j) is equal to__________________?
A. Wtan(a + )
B. Wtan(a-)
C. Wcos(a + )
D. Wsin(a + )
E. W (sin a + cos ). - The C.G. of a solid hemisphere lies on the central radius 3r_________________?
A. at distance — from the plane base 3r
B. at distance — from the plane base 3r
C. at distance — from the plane base 3r
D. at distance — from the plane base or
E. at distance — from the plane base - If the radius of wire stretched by a load is doubled, then its Young’s modulus will be_______________?
A. doubled
B. halved
C. become four times
D. become one-fourth
E. remain unaffected - The C.G. of a right circular solid cone of height h lies at the following distance from the base________________?
A. h/2
B. J/3
C. h/6
D. h/4
E. 3/i/5
