Engineering Mechanics

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

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

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

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

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. 38 m
B. 62.5 m
C. 96 m
D. 124 m
E. 240 m

A. ellipse
B. hyperbola
C. parabola
D. circle
E. none of the above

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

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