You can only unlock the chapter using a special code that we will send you via the Viber app. Receiving a message is free of charge and with no obligations.
My phone number:
Get a code
In compliance with the law, persons under the age of 15 can enter their phone number only in the presence of a parent or guardian.
4-character code:
Check the received code
The page will be refreshed automatically in a few seconds.
To ensure the proper functioning of the website, OpenProf uses cookies that do not store personal data. By continuing to use the website, you agree to cookies. Tell me more »
is needed as shown below.
acts on a beam as shown below.
from a pivot. The moment of this force about this pivot is 
. What is distance 
is pivoted at one end as shown below.
and its weight acts at a point P 
from the pivot point, in which direction and where is the 
to the right of P.
to the left of P.
long meter rule is pivoted at the 
mark as shown below. If the weight of the meter rule is 
, where must a force of magnitude 
act on the meter rule in order to keep it balanced?
mark
mark
mark
is placed at a distance of 
from the end A of a long plank AB lying on the ground as shown below.
, what is the weight 
of the plank which acts at its mid-point?
mark and balanced under the action of three forces 
, 
, and 
, as shown below.
mark
mark
mark
mark
is attached to one end and an empty pan weighing 
is attached to the other end of the beam as shown below.
each must be placed in the pan in order to balance the beam?
about a point is given as 
, what is the distance of the force's line of action from the point?
from the pivot while the son sits at a distance of 
from the pivot. If the weight of the son is 
and the see-saw is balanced, what is the weight of the father?
of the child from the pivot?
each are attached to opposite ends of a beam. If the perpendicular distance of one of the weights from the pivot is 
and the beam is balanced, what is the distance of the other weight from the pivot?
is balanced by a force 
as shown in the figure below. Calculate the magnitude of the force.
of the weight of the man is thrice the force 
of the weight of the woman, what is the ratio of the distance 
of the man from the pivot to the distance 
of the woman from the pivot?
of a rectangular box and the force 
on the ground surface. If the magnitude of the force 
, what is the mass of the box?
is fixed on a vertical wall at point A and balanced horizontally by a vertical rope attached to it at point B. A man of weight 
walks on the plank as shown below.
?
mark and balanced horizontally by a block of weight 
hanging at the zero mark and a ball of weight 
hanging at the 
mark as shown below.
mark. If the metre rule is balanced by a load of weight 
placed at the 
mark and a force 
acting upwards at the 
mark as shown below, what is the magnitude of force F?
and weight 
is pivoted at one end as shown below.
and length 
is supported at both ends by pillars as shown below.
and 
on the ends of the bridge, what are the values of 
is on the bridge, 
from the right-hand pillar?
