Static Equilibrium.

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Presentation transcript:

Static Equilibrium

A truck of mass m pulls one-third of the way onto a uniform slab bridge of mass M. The bridge slab has a length L and is supported by two vertical columns as shown in the diagram. The upward force exerted on the bridge by the column on the left is L m M N

A truck of mass m pulls one-third of the way onto a uniform slab bridge of mass M. The bridge slab has a length L and is supported by two vertical columns as shown in the diagram. The upward force exerted on the bridge by the column on the right is

The tension in the wire is A A physics sign of mass m hangs a the end of a beam of length L and mass M. The beam is clamped to the wall at one end and is held in place by a wire at the other, as shown in the diagram. The tension in the wire is q

A physics sign of mass m hangs a the end of a beam of length L and mass M. The beam is clamped to the wall at one end and is held in place by a wire at the other, as shown in the diagram. Tension in the wire is T. The vertical component of the force the wall exerts on the beam is q

A physics sign of mass m hangs a the end B A physics sign of mass m hangs a the end of a beam of length L and mass M. The beam is clamped to the wall at one end and is held in place by a wire at the other, as shown in the diagram. Tension in the wire is T. The horizontal component of the force the wall exerts on the beam is q

D A light horizontal beam attached to a wall at one end is held in place by a wire attached to the other as shown in the diagram. The tension in the wire is T and the vertical and horizontal components of the for the wall clamp exerts on the beam are V and H, respectively. A bear starting at the wall walks toward the other end of the beam. T H V Which of the following statements correctly describes the changes in the forces acting on the beam I. Tension in the wire increases II. Horizontal component decreases III. Vertical component decreases (A) statement I only (B) Statement III only (C) Statements I and II (D) Statements I and III (E) Statements I, II, and III

C A light horizontal beam attached to a wall at one end is held in place by a wire attached to the other as shown in the diagram. The tension in the wire is T and the vertical and horizontal components of the for the wall clamp exerts on the beam are V and H, respectively. A bear starting at he wall walks toward the other end of the beam. T H V Which of the following statements correctly describes the changes in the forces acting on the beam I. Tension in the wire increases II. Horizontal component increases III. Vertical component increases (A) statement I only (B) Statement III only (C) Statements I and II (D) Statements I and III (E) Statements I, II, and III

A uniform ladder of mass m is placed against q A uniform ladder of mass m is placed against a frictionless wall. The ladder makes an angle q with the floor as shown in the diagram The force the wall exerts on the top of the ladder is

A uniform ladder of mass m is placed against q A uniform ladder of mass m is placed against a frictionless wall. The ladder makes an angle q with the floor as shown in the diagram The frictional force the floor exerts on the ladder is

A uniform ladder of mass m is placed against q A uniform ladder of mass m is placed against a frictionless wall. The ladder makes an angle q with the floor as shown in the diagram The magnitude of the vertical component of the force the floor exerts on the ladder is