Bài 1:
The mass of 700kg is suspended from a trolley which moves along the crane rail from d = 1.7m to d = 3.5m. Determine the force along the pin - connected knee strut BC (short link) and the magnitude of force at pin A as a function of position d. Plot these results of F_BC and F_A (vertical axis) versus d (horizontal axis).

Bài 2: Determine the horizontal and vertical components of reaction at the pin A and the normal force at the smooth peg B on the member.

Bài 4:
The uniform rod há a length l and weight W. It is supported at one end A by a smooth wall and the other end by a cord of length s which is attached to the wall as shown. Show that for equilibrium it is required that h = [(s² - l²)/3]^1/2

Bài 5:

Lời giải bài 1:

Lời giải bài 2:

Lời giải bài 3:

Lời giải bài 4:

Lời giải bài 5: