AS Level Physics U5 Quiz on Vector Triangles of Forces

The diagrams show two ways of hanging the same picture. In both cases, a string is attached to the same points on the picture and looped symmetrically over a nail in a wall. The forces shown are those that act on the nail. In diagram 1, the string loop is shorter than in diagram 2. Which information about the magnitude of the forces is correct?

Two rigid rods, XZ and YZ, are fixed to a vertical wall at points X and Y. A load of weight W is hung from point Z. The load is not moving. Which diagram shows the forces acting at point Z?

Which two vector diagrams represent forces in equilibrium?

A simple crane consists of a rigid vertical pillar supporting a horizontal beam. A weight W is lifted by a rope at the end of the beam. What are the forces at points X, Y and Z due to the weight W?

Three coplanar forces, each of magnitude 10 N, act through the same point of a body in the directions shown. What is the magnitude of the resultant force?

The diagrams show three forces acting on a body. In which diagram is the body in equilibrium?

Which two vector diagrams represent forces in equilibrium?

The diagram shows a sign of weight 20 N suspended from a pole, attached to a wall. The pole is kept in equilibrium by a wire attached at point X of the pole. The force exerted by the pole at point X is F, and the tension in the wire is 40 N. Which diagram represents the three forces acting at point X?

A hinged door is held closed in the horizontal position by a cable. Three forces act on the door: the weight W of the door, the tension T in the cable, and the force H at the hinge. Which list gives the three forces in increasing order of magnitude?

A pendulum bob is held stationary by a horizontal force H. The three forces acting on the bob are shown in the diagram. The tension in the string of the pendulum is T. The weight of the pendulum bob is W. Which statement is correct?