Science(Moments,leavers and center of gravity)
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| How does a person calculate the moment of force? | Moment of force = force x perpendicular distance from the fulcrum to the line of action of the force
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| What is a leaver? | A rigid body that can turn about a fixed point called a fulcrum
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| Give examples of everyday examples of leavers | Scissors,wheelbarrow and a door
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| What is the law of the leaver? | This states that when a leaver is balanced the sum of the clockwise moments = the sum of the anti-clockwise moments
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| What is the centre of gravity in an object? | A point in the object through which all the weight of the object appears to act
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| What is a stable equilibrium? | The ball will return to the same position if given a slight push
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| What is an unstable equilibrium? | The ball will not return to the same position if given a slight push
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| What is a neutral equilibrium? | The ball will return to a similar position if given a slight push
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| What are two basic ideas to follow to improve the stability of objects? | A wide base and a low centre of gravity, E.g a busen burner
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Created by:
Chimozukee
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