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प्रश्न
State one way to obtain greater moment of a given force about a given axis of rotation.
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उत्तर
In order to generate the maximum torque to turn the body, the force is applied at a position on the body where the line of action's perpendicular distance from the axis of rotation is maximum.
संबंधित प्रश्न
Less force is needed when applied at a farther distance from the pivoted point.
A tall building has wide foundations.
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 Nm. What minimum force must be applied on its rim?
What are non-contact forces? Give two example
State Newton's Second law of motion. Under what conditon does it take the form F = ma?
State the relationship between force, mass and acceleration. Draw graphs showing the relationship between Acceleration and force for a constant mass.
State the relationship between force, mass and acceleration. Draw graphs showing the relationship between Acceleration and mass for a constant force.
Name and define the S.I. and C.G.S. units of force. How are they related?
Calculate the acceleration produced in a body of mass 50 g when acted upon by a force of 20 N.
Classify the following amongst contact and non-contact forces.
Frictional force
Calculate the resultant moment of forces about O and state its direction in fig.
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.
(i) What do you understand by the term couple of forces?
(ii) Calculate the moment of a couple shown in fig.
How does the distance of separation between two bodies affect the magnitude of the non-contact force between them?
Two unlike forces (parallel) of 10 N and 25 N act at a distance of 12 cm. from each other. Find the point about which the body balance.
A uniform metre scale is balanced at a 40 cm mark when weights of 20 gf and 5 gf are suspended at 5 cm mark and 75 cm mark respectively. Calculate the weight of metre scale.
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.
A door lock is opened by turning the lever (handle) of length 0.2 m. If the moment of force produced is 1 Nm, then the minimum force required is ______.
