Advertisements
Advertisements
प्रश्न
State two conditions for a body acted upon by several forces to be in equilibrium.
Advertisements
उत्तर
Conditions for equilibrium:
- The resultant of all the forces acting on the body should be equal to zero.
- When all forces are applied to the body around the rotational point, the resultant moment should be zero.
संबंधित प्रश्न
State the condition when a body is in dynamic equilibrium.
State two condition for a body acted upon by several forces to be 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?
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?
Give scientific reason for the following:
When a man climbs a slope he bends forward.
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]`
Explain why It is easier to knock down a boy who is standing on one foot than one who is standing on two.
What is the weight of a body placed at the centre of the earth?
A ball is placed on a compressed spring. When the spring is released, the ball is observed to fly away.
(i) What form of energy does the compressed spring possess?
(ii) Why does the ball fly away?
Explain the concept which is used in the continuous movement of the Thanjavur doll?
