Back to quiz

6. What is the principle of moments?

  • Total anticlockwise moments = 2x total clockwise moments
  • Total anticlockwise moments = total clockwise moments
  • Total anticlockwise moments = 1/2 total clockwise moments

7. What types of materials obey Hooke's Law?

  • Plastic materials
  • Elastic materials
  • Natural materials
  • Magnetic materials

8. How do you increase the moment?

  • Only increasing the force
  • Decreasing the force and increasing the distance
  • Increasing the distance or the force
  • Increasing the distance but never the force

9. What occurs if anti clockwise moments and clockwise moments aren't equal?

  • There will be a resultant force in a certain direction causing the object to turn
  • There will be zero resultant force and the object will stay in equilibrium
  • There will be a resultant force acting downwards

10. What is Hooke's Law?

  • The extension of a spring and the force acting on it have no correlation
  • The extension of a spring is proportional to the force acting on it
  • The extension of a spring is indirectly proportional to the force acting on it

11. How do you find the centre of gravity of a freely suspended object?

  • It will swing until its centre of gravity is vertically below the point of suspension
  • It will swing until it falls under its centre of gravity
  • It will pivot until its centre of gravity is vertically bellow the point of suspension

12. What is the equation linking moment, force and distance?

  • Moment = Perpendicular Distance from Pivot/Force
  • Moment = Force x Perpendicular Distance from Pivot
  • Moment = Force + Perpendicular Distance from Pivot
  • Moment = Force/Perpendicular Distance from Pivot