7.4:
Problem Problem 7.5:
Problem 7.12:
Problem 7.13:
Problem 7.14:
Problem 7.15:
Problem 7.17:
Problem 7.18:
Problem 7.21:
Problem H.04: The frame shown below is composed of three members (ABCD, CEF, and BE) that are connected to each other through pins at B, C, and E. The frame is supported by a pin at A and a roller at F. A horizontal force of 75 lb is applied at point D, as shown. Determine the reactions at pins A, B, and C. Draw ALL FBDs necessary to solve this problem.
Problem H.05: When a bicycle rider squeezes the brake lever on the handlebars, the lever pulls a cable that is attached to the brake calipers. The cable pulls up at G on a wire attached to B C, and causing the two calipers to rotate about pin A and engage the wheel. When the cable at G is pulling upward with a force of 200 N, what is the normal force due to the brake pad acting on the wheel rim at E? Ignore the moment at A due to a spring (not shown) that restores the brake to its open position.
Problem H.06: The frame shown below is composed of three members: ABC, BED, and CEF. There are pinned connections at A, B, C, D and E and a rocker support at F. Determine the horizontal and vertical forces at pins B and C. (Note the pulley at D has a radius of 1 ft.) Draw all FBDs necessary to solve this problem, and put units on your answers.
Problem H.06: (cont.)