Advertisements
Advertisements
प्रश्न
Define the moment of force.
Advertisements
उत्तर १
The turning effect produced by a force on a rigid body about a point, pivot or fulcrum is called the moment of force or torque. It is measured by the product of force and the perpendicular distance of the pivot from the line of action of force.
Moment of a force = Force × perpendicular distance of the pivot from the force.
उत्तर २
The turning effect of force acting on a body about an axis is called the moment of force.
APPEARS IN
संबंधित प्रश्न
Thrust is the ............ force acting on a surface.
State the effect of force F in of the following diagram.

Write the expression for the moment of force about a given axis of rotation.
The steering wheel of a vehicle is of large diameter.
The moment of a force of 25 N about a point is 2.5 N m. Find the perpendicular distance of force from that point.
Name and define the S.I. and C.G.S. units of force. How are they related?
State one way to reduce the moment of given force about a given axis of rotation.
A spanner (or wrench) has a long handle. Why?
A body is acted upon by two forces of magnitude F but in opposite directions. State the effect of the force if both forces act at the same point of the body.
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.

Classify the following amongst contact and non-contact forces.
gravitation force
Classify the following amongst contact and non-contact forces.
electrostatic force
Define couple.
What is the work done when no net force is applied on the body?
Fig. 5 shows a uniform meter scale weighing 200 gf. Provided at its centre. Two weights 300 gf and 500 gf are suspended from the ruler as shown in the diagram. Calculate the resultant torque of the ruler and hence calculate the distance from mid-point where a 100 gf should be suspended to balance the meter scale.

Three forces A, B and C are acting on a rigid body which can turn about O in fig.9. If all the three forces are applied simultaneously, in which direction will the body move? Explain.

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 total clockwise moment about O

State one factor on which the magnitude of a non-contact force depends. How does the magnitude of a non-contact force change along with distance?
