Turning Forces,centre Of Gravity

Question 1

Lever

Answer 1

Is any rigid body which is free to turn about a fixed point called the fulcrum e.g. Scissors
Door handle etc.

Question 2

The law of the lever

Answer 2

States that when a lever (e.g. A metre stick) is balanced, the total clockwise moments equal the total anti-clockwise moments.

Question 3

Stable equilibrium

Answer 3

Lies present if when an object is slightly tilted, it’s centre of gravity is raised, and it goes back to the original position on release.

Question 4

Objects in stable equilibrium

Answer 4

Will have have a wide base and a low centre of gravity

Question 5

Unstable equilibrium

Answer 5

Is present if when an object is slightly tilted, it’s centre of gravity is lowered, and it takes a new position when released (i.e. It falls over on its side).

Question 6

Moment

Answer 6

Of a force is the turning effect of a force

Moment=(force) x (distance from the fulcrum)