(a)[2]
Write down an expression for the moment of $F$ about the axis at X. Use Fig. 8.1 to show what is meant by any other term included in your expression.
(b(i))[2]
State what the principle of moments says.
(b(ii))[3]
Describe how to do an experiment to confirm the principle of moments. Include a diagram to support the description.
(c(i))[1]
Given that the gravitational field strength is $10\,\text{N kg}^{-1}$, calculate the ladder's weight.
(c(ii))[1]
State what the term centre of mass means.
(c(iii))[1]
The centre of mass of the ladder is not halfway along its length. State what this shows about the ladder.
(c(iv))[2]
Calculate the moment about the worker’s shoulder due to the ladder’s weight.
(c(v))[3]
Determine the size and direction of the force acting at L.