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प्रश्न
Explain why It is easier to knock down a boy who is standing on one foot than one who is standing on two.
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उत्तर
It is easier to knock down a boy who is standing on one foot than one who is standing on two because boy standing on both feet has a larger base area and hence it has a more stable equilibrium than a boy standing on one foot.
संबंधित प्रश्न
Define equilibrium.
In a beam balance, when the beam is balanced in a horizontal position, it is in ______ equilibrium.
The figure shows a uniform metre rule placed on a fulcrum at its mid-point O and having a weight 40 gf at the 10 cm mark and a weight of 20 gf at the 90 cm mark.
- Is the metre rule in equilibrium? If not how will the rule turn?
- How can the rule be brought in equilibrium by using an additional weight of 40 gf?
State the principle of moments. A meter scale is pivoted at 30 cm mark and it is in equilibrium when a mass of 40 g is suspended from 10 cm mark. Calculate the mass of the ruler.
Give scientific reason for the following:
When a man climbs a slope he bends forward.
Give scientific reason for the following:
In a moving bus the standing passenger stands keeping both his legs apart.
What makes a balance faulty?
In figure, a uniform bar of length l m is supported at its ends and loaded by a weight W kgf at its middle. In equilibrium, find the reactions R1 and R2 at the ends.
`["Hint:" "In equilibrium" "R"_1 + "R"_2 = "W" "and" "R"_1 xx l/2 = "R"_2 xx l/2]`
One end of a spring is kept fixed while the other end is stretched by a force as shown in the diagram.
(i) Copy the diagram and mark on it the direction of the restoring force.
(ii) Name one instrument which works on the above principle.
How can we increase the stability of an object?
