Moment Of Force

Question 1

Name some everyday application of levers

Answer 1

Scissors
💩the item being cut is the load
💩the force applied by the fingers is the effort
💩the fulcrum is located between the effort and the load
Wheelbarrow
💩the person applies the force from the handlebars
💩the fulcrum is the axle of the wheel at the front
💩the load is between the effort and the fulcrum
Door
💩the fulcrum is the hinges at one edge of the door
💩the effort is the lush applied to the handle
💩the load is the door that is being moved

Question 2

What is a lever

Answer 2

A rigid body that can turn about a fixed point called a fulcrum

Question 3

What is the law of a lever

Answer 3

When a lever is balanced the sum of the clockwise moments equals the sum of the anti clockwise moments.

Question 4

What is the center of gravity of an object

Answer 4

A point in the object through which all the weight of the object appears to act

Question 5

What is a equilibrium

Answer 5

When an object is balanced and still,we say that the object is in equilibrium.A uniform meter stick suspended from its center of gravity is a good example of an object being in equilibrium.

Question 6

What are the three states of equilibrium

Answer 6

💩Stable equilibrium:the ball WILL RETURN to same position if given a slight push
💩unstable equilibrium:the ball WILL NOT RETURN to same position if given a slight push
💩neutral equilibrium: the will return to similar position if given a slight push

Question 7

What is stability

Answer 7

Many objects are designed for stability.This means that these objects will not topple over easily.

An object will topple over is the weight of the object acting through the centre of gravity passes outside the base of the object.

Question 8

How do you calculate the moment of force

Answer 8

Moment of force:force ✖️perpendicular distance from the fulcrum to the line of action.