Problem 1 Blocks A and B have a mass of 25 kg and 10 kg, respectively, as shown in Fig. 1. There are pulleys at C and D. Using the coefficients of static friction indicated, (a) (b) (c) Draw the free-body diagrams of blocks A and B. Determine the largest force P which can be applied to the cord without causing motion. Would block B tilt before sliding occurs if P is increased further? 300 mm B 400 mm A D MAB = 0.3 == PA = 0.1 Fig. 1 P

Need help, please provide all work and round answers to 3 sig figs.

2. A 200-mm-diameter pulley is prevented from rotating relative to 60-mm-diameter shaft by a 70-mm-long key. If a torque T = 2.2 kN-m is applied to the shaft, determine the width "b" if the allowable shearing stress in the key is 60 MPa. key 70 mm Shaft 10 mm 200 mm-o Shaft 60 mm-o

A tripod is shown in the figure consists of three members AB, AC and AD whose lower ends are in the xy plane. Member AB is subjected to a compressive force of 700 N. Determine the following: 1. Force in member AC.2. Force in member AD.3. Vertical load P.

INSTRUCTION: Solve the diagram given below. Determine the ff items rounded to two decimals. 40 kN 25 kN/m 55 kN/m 45 kN/m A 3 m 1 m 2 m 3.5 m 3.5 m B A a.) Determine the value of positive max moment in KN-m Blank 1 b.) Determine the value of negative max moment in KN-m Blank 2 c.) Determine the value of max shear Blank 3 d.) Find the minimum height of the rectangular beam in mm, rounded up divisible to 50 mm, if the flexural stress is not to exceed 50 mPa, given that the base of a rectangular section is 80mm. Blank 4 e.) Find the minimum height of the rectangular beam in mm, rounded up divisible to 50 mm, if the flexural stress is not to exceed 5 mPa, given that the base of a rectangular section is 80mm. Blank 5

Compute the maximum force P (lb) that can be applied by the machine operator, if the shearing stress in the pin at B and the axial stress in the control rod at C are limited to 4,000 psi and 5,000 psi, respectively. The diameters are 0.25 inch for the pin, and 0.5 inch for the control rod. Assume single shear for the pin at B 2 IT в с T10 6 in 2 in

Principles of Steel Design

Mechanics

3. The center post B of the assembly has an original length of 124.8 mm whereas posts A and C have a length of 125 mm. If the caps on the top and bottom can be considered rigid, determine the average normal stress in each post. The posts are made of aluminum and have a cross sectional area of 400 mm². Ea=70 GPa. Use the Force Method 100 mm -100 mm 800 kN/m 125 mm 800 kN/m

Ends A and D of the two solid steel shafts AB and CD are fixed, while ends B and C are connected to gears as shown. Knowing that a 6-kNm torque T is applied to gear B, calculate the maximum shearing stress (a) in shaft AB, (b) in shaft CD. 40 mm 384 mm C 200 mm 20mm 600 mm