Every member labeled #$4$ is $17cm$ long while each member labeled with #$5$ is $24cm$ long.

b$.$ Identify all zero force members in the system if a $1$ kg load was applied to joint F$.$

Record the internal loads read by the load cells at members DF$,$ AB$,$ DB and FB and

compare the results with your answer. Determine if these loads are in tension or

compression.

c$.$ Identify all zero force members in the system if a $1$ kg load was applied to joint B$.$

Record the internal loads read by the load cells at members DF$,$ AB$,$ DB and FB and

compare the results with your answer. Determine if these loads are in tension or

compression.

d$.$ Using the Method of Joints, calculate the load carried by the members DF$,$ AB$,$ DB and

FB when the $1$ kg weight is hanging from joint D$.$ Determine whether each member is in

tension or compression