Advertisements
Advertisements
Question
What is meant by the term ‘moment of force’? If the moment of force is assigned a negative sign then will the turning tendency of the force be clockwise or anti-clockwise?
Advertisements
Solution
It is equal to the product of the magnitude of the force and the perpendicular distance of the line of action of a force from the axis of rotation. If the moment of force is assigned a negative value, it means the clockwise tendency of force.
APPEARS IN
RELATED QUESTIONS
Name the factors affecting the turning effect of a body
A half metre rod is pivoted at the centre with two weights of 20gf and 12gf suspended at a perpendicular distance of 6 cm and 10 cm from the pivot respectively as shown below.
1) Which of the two forces acting on the rigid rod causes clockwise moment?
2) Is the rod in equilibrium?
3) The direction of 20 kgf force is reversed. What is the magnitude of the resultant moment of the forces on the rod?
State the S.I. unit of moment of force.
The moment of a force of 10 N about a fixed point O is 5 N m. Calculate the distance of the point O from the line of action of the force.
A uniform metre scale can be balanced at the 70.0 cm mark when a mark when a mass 0.05 kg is hung from the 94.0 cm mark
- draw a diagram of the arrangement
- Find the mass of the metre 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.
Define non-contact forces.
State the effects that a force can produce. Given one example of each.
On a see-saw, two children of masses 30 kg and 50 kg are sitting on one side of it at distance 2 m and 2.5 m respectively, from its middle, where should a man of mass 74 kg sit to balance it?
