A Level Maths Mechanics Year 2 Chapter 4: Mini test

Where is it easiest to open a door from?

• The side with the hinges
• The side opposite the hinges

Units for moments

• N/m
• Ns
• Nm
• kgm²s^-2

Clockwise moment about P =

• 12 × 8
• 12 × 8sin35
• 12 × 8cos35
• 8 × 12sin35

Uniform body in equilibrium. Find x and y

• x=10, y=15
• x=15, y=10
• x=7.5, y=17.5
• x=17.5, y=7.5

Rod lies on supports A and B. About to to tilt at B

• Normal reaction at B disappears
• Normal reaction at A disappears
• Use equilibrium between vertical forces