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igcse physics notesprinted 30 · PDF 30
124 pagesrevision 46936
printed 30 · PDF 30
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A heavy beam rests on two supports. The diagram shows the only three forces F;, F2 and F3
acting on the beam.
F, F,
7 aalia
support A | A. support
n
w
The beam is in equilibrium.
Which statement is correct?
A_ All the forces are equal in size.
The resultant force on the beam is in the opposite direction to the resultant turning effect.
B
C_ The resultant force on the beam is zero and the resultant turning effect on the beam is zero.
D
The total upward force is twice the total downward force.
A heavy truck on wheels has a platiorm attached to i.
A man stands on the platiorm.
The truck does not fail over.
Which position A. B, C or D could be the centre of mass of the whole system (truck, platform and
man)?
platioemn
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