Advertisements
Advertisements
Question
A wheel of diameter 2 m is shown in the figure with the axle at O. A force F = 2 N is applied at B in the direction shown in the figure. Calculate the moment of force about
- the centre O, and
- the point A.
Advertisements
Solution
Diameter of wheel = 2 m
Radius of wheel = `2/2` = 1 m
Force applied at B = 2 N
i. Moment of force at O (clockwise)
= 2 N × 1
= 2 N m
ii. Moment of force at A (clockwise)
= 2 N × 2m
= 4 N m
APPEARS IN
RELATED QUESTIONS
A force is applied on (i) a non-rigid body and (ii) a rigid body. How does the effect of the force differ in the above two cases?
Write the expression for the moment of force about a given axis of rotation.
State one factor on which the magnitude of a non-contact force depends. How does it depend on the factor stated by you?.
Is moment of force a scalar or a vector?
State two factor on which moment of force about a point depends.
A spanner (or wrench) has a long handle. Why?
Explain the motion of a planet around the sun in a circular path.
Give an example for each of the following uses of a machine:
to change the point of application of force
What is the work done when no net force is applied on the body?
A uniform metre rule rests horizontally on a knife-edge at the 60 cm mark when a mass of 10 gram is suspended from one end. At which end must this mass be suspended? What is the mass of the rule?
