Strength of Materials

A. kinetic friction
B. limiting friction
C. angle of repose
D. coefficient of friction
E. friction force

A. Wtan(a + )
B. Wtan(a-)
C. Wcos(a + )
D. Wsin(a + )
E. W (sin a + cos )

A. r/2
B. r/A
C. r/%
D. 0.134 r
E. 3r/8

A. balance each other
B. cannot balance each other
C. produce moment of a couple
D. are equivalent
E. none of the above

A. limiting friction
B. sliding friction
C. rolling friction
D. kinematic friction
E. dynamic friction

A. coplanar
B. meet at one point ;
C. both A. and B. above
D. all be equal
E. something else

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

A. 25
B. 50
C. 100
D. 250
E. 500

A. kg m
B. kcal
C. wattr
D. watt hours
E. kg m x (m/sec)2

A. density of metal can’t be determined
B. metal is twice as dense as water
C. metal will float in water
D. metal is twice as dense as unknown fluid
E. none of the above