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WorksheetsTurning Effect of a Forces (Moments)
Total questions: 35
Worksheet time: 9hrs 45mins
A nut can be loosened more easily with
a short spanner because a larger turning effect can be produced.
a long spanner because a larger turning effect can be produced.
a long spanner because a larger force can be produced.
a short spanner because a larger force can be produced.
Jack has a weight of 300 N and sits 2.0 m from the pivot of see-saw. Jill has a weight of 450 N and sits 1.5 m from pivot. Who will move down?
Jack
Jill
Both of them
None of them
When an object is in equilibrium, which equation is true?
Clockwise moment = anticlockwise moment
Clockwise moment + anticlockwise moment = 0
Clockwise moment / anticlockwise moment = 0
Clockwise moment + anticlockwise moment = resultant force
The moment of a force causes an object to
move forward
move backward
stop moving
turn about a fixed point
Which one of the following activities does not apply the turning effect of a force?
swinging on a swing
sliding down a slide
moving up and down on the see-saw
rowing a boat
What is the unit of moment f force?
N
m
Nm
N/m
What is the formula for moments?
Force = Distance x time
Moment = Force ÷ distance
Moment = Force x distance
Force = distance x Moment
A boy of weight 600N sits on the see-saw as shown at a distance of 1.5m from the pivot. What is the force F required at the other end to balance the see-saw?
450 N
350 N
4.5 N
200 N
What to we call forces applied to anything that turns?
Minute
Moment
Minimum
Monument
Two boys exert force of 40 N and 60 N in opposite directions on an object. The magnitude of the resultant force is ________.
20 N
200 N
40 N
240 N
Pivot is the point about which a force is turned by an object.
True
False
Principle of moments states that an object is balanced when clockwise moments are equal to anticlockwise moments.
True
False
Moment = force / distance from pivot
True
False
The greater the force, the greater its turning effect.
True
False
The further the force is from the pivot, the greater its turning effect.
True
False
The bigger the moment of a force, the smaller its turning effect.
True
False
What is the moment acting on the left side of the pivot?
2 Nm
20 Nm
200 Nm
0.2 Nm
What is the moment acting on the right side of the pivot?
2 Nm
20 Nm
200 Nm
0.2 Nm
The beam is balanced.
True
False
A force of 4 N acts on a lever 2 m from the pivot. What is the moment?
8 Nm
6 Nm
2 Nm
3 Nm
A force is a _____
push
pull
Both push and pull
Object
The sum of all forces acting on an object= _______
mass
action / reaction force pair
net force
inertia
What is the net force?
17N to the left
3N to the right
17N to the right
3N to the left
State the principle of moments.
When a system is in equilibrium, the sum of the total clockwise moment is equal to the sum of the total anti-clockwise moment about the same pivot.
When a system is in equilibrium, the sum of the total clockwise moment is greater the sum of the total anti-clockwise moment about the same pivot.
When a system is in equilibrium, the sum of the total clockwise moment is less than the sum of the total anti-clockwise moment about the same pivot.
When a system is in equilibrium, the sum of the total clockwise moment is greater than the sum of the total anti-clockwise moment about different pivots.
