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What do you understand by the kinetic energy of a body?
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State two conditions for a body acted upon by several forces to be in equilibrium.
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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.
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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.
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What do you mean by the state of equilibrium? What are the conditions for stable equilibrium?
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A meter scale is pivoted at its mid point and a 50 g mass suspended from the 20 cm mark. What mass balances the ruler when suspended from 65 cm mark?
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Give scientific reason for the following:
When a man climbs a slope he bends forward.
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Give scientific reason for the following:
While climbing a hill you will try to bend your body forward.
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Give scientific reason for the following:
In a moving bus the standing passenger stands keeping both his legs apart.
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A faulty balance of equal arms but pans of unequal weight is used to find the weight of a body. By the method of double weighing the weights are found as 8 kg and 8.2 kg. Find the actual weight of the body.
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The arms of a beam balance are 20 cm and 21 cm, but the pans are of equal weight. By the method of double weighing the weights are found to be 1000 g and 20 g. Find the actual weight of the body
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A faulty balance of unequal arms and pans of unequal weights is used to find the true weight of a metal. By double weighing the weights are found to be 1210 g and 1000 g. Calculate the true weight of the metal.
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Make the correct choice for each of the following :
Which one of the five diagrams represents the path of a ray of light through a periscope?
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In equilibrium algebraic sum of moments of all forces about the point of rotation is ______.
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The moon revolving around the earth is in ______ equilibrium.
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