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प्रश्न
Give an example of the following uses of a machine:
to change the direction of force
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उत्तर
A pulley is used to change the direction of application of force.
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संबंधित प्रश्न
Name the factors affecting the turning effect of a body
A force is applied on (i) a non-rigid body and (ii) a rigid body. How does the effect of the force differ in the above two cases?
Less force is needed when applied at a farther distance from the pivoted point.
It is easier to open the door by pushing it at its free end.
The moment of a force of 25 N about a point is 2.5 N m. Find the perpendicular distance of force from that point.
State the relationship between force, mass and acceleration. Draw graphs showing the relationship between Acceleration and force for a constant mass.
Write the expression for calculating the moment of force about a given an axis.
Classify the following amongst contact and non-contact forces.
normal reaction force,
Assertion & Reasoning
- Assertion: The sum of the clockwise moments is equal to the sum of the anticlockwise moments.
- Reason: The principle of conservation of momentum is valid if the external force on the system is zero.
Clockwise moment produced by a force about a fulcrum is considered to be ______.
