51. A rope is wrapped twice around a rough pole with a coefficient of friction ‘A . It is subjected to a force Fj at one end and a gradually increasing force F2 is applied at the other end till the rope just starts slip-ping. At this instant the ratio of F2 to Fi is_____________________?

A. 1
B. e2*
C. e4*
D. e*72
✅ The correct answer is option B.

55. The member forces in a statically in determinate truss____________________?

A. can be obtained by graphic statics
B. cannot be obtained by graphic statics
C. may be obtained by graphic statics
D. can be obtained by graphic statics by trial and error
✅ The correct answer is option B.

57. If a projectile is fired with an initial velocity of 10 m/sec at an angle of 60° to the horizontal, its horizontal and vertical velocity at the highest point of trajectory are___________________?

A. 0 and 5 m/sec
B. 5 m/sec and 0
C. 5 V3 m/sec and 0
D. 5 and 5V3 m/sec
✅ The correct answer is option B.