Tài liệu học tập
The sphere in Fig.1 has a mass of 6 kg and is supported as shown. Draw a free-body diagram of the sphere, the cord CE, and the knot at C.
Determine the tension in cables BA and BC necessary to support the 60-kg cylinder in Fig.2.
The 200-kg crate in Fig.3 is suspended using the ropes AB and AC. Each rope can withstand a maximum force of 10kN before it breaks. If AB always remains horizontal, determine the smallest angle q to whichthe crate can be suspended before one of the ropes breaks.
Determine the required length of cord AC in Fig.4 so that the 8-kg lamp can be suspended in the position shown. The undeformed length of spring AB is l’AB = 0.4m and the spring has a stiffness of kAB = 300N/m.
Determine the horizontal and vertical components of reaction on the beam caused by the pin at B and the rocker at A as shown in Fig.5. Neglect the weight of the beam.