WorksheetsChapter 3 : force and moment
Total questions: 23
Worksheet time: 11mins
F=m/a
F=a/m
F=ma
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 equal to the sum of the total anti-clockwise moment about the different pivot.
A see-saw is made by resting a long plank of wood with its centre of gravity on the barrel.
A boy sits on one side of the barrel and a girl sits on the other side so that the see-saw is balanced.
Which of the following statements must be true?
boy’s weight = girl’s weight
distance x = distance y
moments of the girl = moments of the boy
moment of the girl > moment of the boy
Which diagram best demonstrates the use of the moment of a force?
A
B
C
D
The figure below shows a man lifting a heavy rock using a steel bar. He pushes downwards on the end of the bar with a force F.
Which pivot positions allows the force F to be as small as possible?
A
B
C
D
What is the Unit for moment
Nm
N
W
J
