A. two forks
B. one fork
C. three forks
D. four forks
E. five forks
A. have line contact
B. have surface contact
C. permit relative motion
D. are held together
E. have dynamic forces
A. parallel to OA
B. perpendicular to OA
C. at 45° to OA
D. along AO
E. along OA
A. point or line contact between the two elements when in motion
B. surface contact between the two ele-ments when in motion
C. elements of pairs not held together mechanically
D. two elements that permit relative motion
E. none of the above
A. inertia
B. momentum
C. moment of momentum
D. work
E. torque
A. compound gears
B. worm and wheel method
C. Hooke’s joint
D. crown gear
E. bevel gears
A. a straight line
B. a circle
C. involute
D. cycloidal
E. helix