1) A ball rests against a step. A force, F , is applied in an attempt to rotate the ball up the step.

Which force would not be able to create a moment able to rotate the ball up the step?

2) 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?

3) 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?

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) The figure below represents a uniform lamina with two shaded portions cut out. In which quadrant is the centre of gravity of the remaining portion?