This document contains multiple physics problems related to forces, friction, and equilibrium. It asks the reader to calculate forces required to initiate movement given masses and friction coefficients, determine ranges of mass where systems are in equilibrium, find maximum thicknesses before slipping occurs, and compute moments and forces for various objects in contact based on specifications provided.

1. Problems

2. Problems

3. Calculate the force P necessary to initiate
movement of the 40 kg cylinder. Friction coefficient
for both surfaces is 0.25. What is the friction at B?

5. Determine the range of cylinder mass m for which the
system is in equilibrium. Coefficient of friction between
the 50 kg block and the incline is 0.15 and that between
the cord and the cylindrical support is 0.25

7. Coefficient of friction is 0.5. block has 8 kg mass.
What is the force p required to make the block slip?

9. Determine the maximum slab thickness b so that the
slab can get dragged in by means of friction alone.

11. What happens first? Rolling or slipping?

13. Man is 180 lb. friction is 0.60. compute the
force exerted on the rope by the man for
lowering himself slowly.

15. Tension in cable is 10000 lb. the 5/4” screws have a mean
diameter of 1.15 “ and have five threads per inch. Friction is
0.25 max. determine moment M required for tightening and
loosening

16. T=8KN. Mean diameter = 16 mm, Lead = 4 mm.
coefficient of friction = 0.24. Calculate M for
movement in either direction.