At the local highway department, the bridge designer is required to calculate the force in the top horizontal member of a new bridge truss. The member force is need to help determine the correct type of material and the size of the member.
What is known:
The car mass is 1,500 kg.
The car is located at joint 2.
The bridge length is 16 m (4 bays).
The bridge height is 4 m.
Joint 1 is a pin support, and joint 5 is a
When the car is over joint 2, what is the force in member 6-7?