Mechanical 1 Forces and Loading

If the object is in equilibrium what is the size of force P?

• $50\cos30\degree$

• $50\sin30\degree$

• $Q\cos30\degree$

• $50\div\sin30\degree$

What is the resultant horizontal force?

Point A is the pivot. What is the moment created by the 2N force?

• 4Nm anticlockwise

• 4Nm clockwise

• 0Nm

• 10Nm anticlockwise

Point A is the pivot. What is the moment created by the 3N force?

• 6Nm anticlockwise

• 15Nm clockwise

• 0Nm

• 15Nm anticlockwise

Point A is the pivot. What is the moment created by the 5N force?

• 25Nm anticlockwise

• 10Nm clockwise

• 0Nm

• 10 Nm anticlockwise

What is the total moment around point A?

• 60Nm anticlockwise

• 40Nm anticlockwise

• 20Nm anticlockwise

• 50Nm anticlockwise

What is the resultant force on the lamina?

• $\sqrt{1^2\ +\ 2^2}$ N

• $\sqrt{5^2\ +\ 2^2}$ N

• 3 N

• 7 N

Select all conditions of equilibrium

• The resultant force is zero

• The resultant stress is zero

• The resultant moment is zero

• All forces are equal

What property of a material is represented by the Young's Modulus (modulus of elasticity)?

• ductility

• toughness

• strength

• stiffness

What are the implications for the behaviour of a component if the operational stress exceeds the elastic limit?

• The component will undergo plastic/permanent deformation

• The component will undergo elastic/permanent deformation

• The component will break

• The component will undergo elastic/temporary deformation