1) A 10.0 m long uniform beam of mass 60.0 kg rests on two supports P and Q.

Cement bags, each of mass 5.0 kg, were placed on the beam at a distance of 1.8 m from Q as shown.

What is the least number of cement bags that can be placed on the beam to make it topple?

2) A balancing toy (blue) is balanced upon a triangular base (red).

When the toy is pushed slightly to one side, it swings back to its original position.

Where is the centre of gravity of the balance toy?

3) A television is held onto a wall by two brackets, as shown.

Which diagram correctly shows the forces on the television from the brackets.

4) The diagram below shows four empty containers made from this glass.

Which empty container is the most stable?

5) A lamp is fixed to the wall by two bolts, X and Y.

The weight of the lamp is 60 N.

What are the magnitudes and directions of the horizontal forces exerted by the lamp on the bolts X and Y?