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प्रश्न
A tall building has wide foundations.
उत्तर
Foundation of buildings are kept wide so that the weight of the building may act on a larger area. As a result, it will exert less pressure on the ground. This avoids sinking of building into the earth.
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संबंधित प्रश्न
State two effects of a force when applied on a body.
State two factors on which affect moment of force.
Find the moment of force of 20 N about an axis of rotation at distance 0.5 m from the force.
State one way to obtain greater moment of a given force about a given axis of rotation.
State Newton's Second law of motion. Under what conditon does it take the form F = ma?
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.
Fig. shows a uniform meter scale weighing 100 N pivoted at its centre. Two weights of 500 N and 300 N are hung from the ruler as shown in fig.
(i) Calculate total clockwise and anticlockwise moments.
(ii) Calculate difference in clockwise moment and anticlockwise moment.
(iii) Calculate the distance from O where a 100 N weight should be suspended to balance the meter scale.
Write the expression for calculating the moment of force about a given point.
