1) A 1 m long uniform beam of weight 6 N is being lifted by a vertical force, F, at the 0.75 m mark.

What if the minimum force, F, that will lift the beam?

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 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?

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

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

5) 2018 S4 EOY P1 Q07

A non-uniform object is resting on an inclined plane as shown in the diagram below. If the object is just about to topple, which position will be its centre of mass?