Advertisements
Advertisements
Question
Calculate the resultant moment of forces about O and state its direction in fig.
Solution
In the given figure, forces 10 N and 100 N act clockwise and the forces 15 N and 4 N act anticlockwise
MOment of force = sum of clockwise moments - sum of anti clockwise moments
Moments of force = (10 x 5 + 100 x 0 + 4 x 6) - ( 15 x 4) = 74 - 60 = 14 Nm
or 14 Nm in clockwise direction.
APPEARS IN
RELATED QUESTIONS
A brass ball is hanging from a stiff cotton thread. Draw a neat labeled diagram showing the forces acting on the brass ball and cotton thread
State the S.I. unit of moment of force.
A wheel of diameter 2 m can be rotated about an axis passing through its center by a moment of force equal to 2·0 N m. What minimum force must be applied on its rim?
Calculate the acceleration produced in a body of mass 50 g when acted upon by a force of 20 N.
A spanner (or wrench) has a long handle. Why?
The figure shows two forces each of magnitude 10 N acting at the point A and B at a separation of 50 cm, in opposite directions. Calculate the resultant moment of two forces about the point.
- A,
- B and
- O situated exactly at the middle of the two forces.
State two factors affecting the turning effect of a force.
The diagram shows a uniform metre rule weighing 100gf, pivoted at its centre O. Two weights 150gf and 250gf hang from the point A and B respectively of the metre rule such that OA = 40 cm and OB = 20 cm. Calculate :
the difference of anticlockwise and clockwise moment
Under what condition will a set of gears produce a gain in torque.
The perpendicular distance between the point of application of force and turning point is 1.75 m when a force of 80 N acts on a rigid body. Calculate the moment of force.
