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Senior High School: 11th and 12th Grade
Physics
Forces - Forces And Turning Effects
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Q.1
What is the turning effect of forces?
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A moment
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A while
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An hour
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A day
Q.2
What is the formula for a moment?
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Moment = F x d
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F = M x d
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d = F x M
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Moment = 2F x d
Q.3
In the above equation, what does represent?
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Distance of a beam
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Distance from the line of action of the force to another force
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Distance from the line of action of the force to the pivot
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Distance to the pivot from the line of action of the force and back again
Q.4
What is a moment measured in?
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N
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m
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N m
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N/m
Q.5
What is the center of mass of an object?
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It is a point on the object where the whole weight of the object seems to act
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It is the central point of an object
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It is a point just above the top of an object
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The center of mass of an object is never found at a point on an object
Q.6
What is stability?
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The ability of an object to maintain its original position
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An object which will oscillate around a point after being displaced but will never come to rest
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An object which continues to move away from its position after being displaced
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None of the above
Q.7
Which statement is true for a body in stable equilibrium?
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It continues to move away from its original position after being displaced
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It returns to its original position after being displaced slightly
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Both of the above
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Neither of the above
Q.8
Which statement is true for a body in unstable equilibrium?
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It returns to its original position after being displaced slightly
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It continues to move away from its original position after being displaced
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Both of the above
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Neither of the above
Q.9
How can the stability of an object be increased?
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Lower its center of mass
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Increase the area of its base
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Both of the above
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Neither of the above
Q.10
If the total clockwise moment around a pivot is 10 N m and the total moment about a pivot is zero, what is the size of the counterclockwise moment?
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1 N m
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5 N m
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10 N m
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20 N m
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