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प्रश्न
Give an example for each of the following uses of a machine:
to change the point of application of force
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उत्तर
A lever is used to change the point of application of force.
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संबंधित प्रश्न
Moment of force =............... × distance of force from the point of turning.
How does the effect of force differ when it is applied on a non-rigid body?
State the S.I. unit of moment of force.
In Fig. a force F is applied in a direction passing through the pivoted point O of the body. Will the body rotate? Give reason to support your answer.
A spanner of length 10 cm is used to open a nut by applying a minimum force of 5.0 N. Calculate the moment of force required.
State Newton's first law of motion. Why is it called the law of inertia?
Write the expression for calculating the moment of force about a given an axis.
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.
Under what condition will a set of gears produce a gain in torque.
