If we did not consider the weight of the beam. On the assumption that the beam is uniform and pivoted in the middle, state why you think this is reasonable.
Important Questions on Turning Effects
In the figure all the forces are of equal size. State the force with the greatest moment about point .
In the figure all the forces are of equal size. State the force that has no moment about point .
In figure, the beam is balanced (in equilibrium). Calculate the size of force .
State and explain the condition that means an object will topple (fall over).
Figure shows two objects that are not very stable. The centre of gravity of each is marked with a dot.
State the two vertical forces that act on each of these objects.
Upward force
Downward force
Draw arrows on each object in figure given below showing the two forces acting on it.
Decide whether each object will fall over. Explain your answer.
Explain, using your knowledge of stability, which of the two cars in figure you would expect to be able to go around a corner at the highest speed, whilst keeping all its wheels on the road.
