A. bearing stresses
B. fatigue stresses
C. crushing stresses
D. resultant stresses
E. none of the above
A. toughness
B. tensile strength
C. capability of being cold worked
D. hardness
E. fatigue strength
A. nature of surfaces
B. area of contact
C. shape of the surfaces
D. ail of the above.
E. A. and B. above
A. equal
B. proportional to their respective moduli of elasticity
C. inversely proportional to their moduli of elasticity
D. average of the sum of moduli of elas-ticity
E. none of the above
A. introduce internal stresses
B. balance the other forces acting on it
C. retard its motion
D. change its motion
E. all of the above
A. r/2
B. 2r/3
C. r/A
D. 3r/2
E. 3r/A
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