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प्रश्न
Give an example for each of the following uses of a machine:
to change the point of application of force
उत्तर
A lever is used to change the point of application of force.
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संबंधित प्रश्न
SI. unit of moment of force is
State two effects of a force when applied on a body.
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.
One joule is the amount of work done when a force of ......... moves a body through a distance of .......
(i) What do you understand by the term couple of forces?
(ii) Calculate the moment of a couple shown in fig.
How does the distance of separation between two bodies affect the magnitude of the non-contact force between them?
State the effects that a force can produce. Given one example of each.
Calculate the minimum distance between point of application of force and axis of rotation of a rigid body, if a force 125 N produces a moment of force of 25.75 Nm.
A person standing in front of a cliff fires a gun and hears its echo after 3s. If the speed of sound in air is 336 ms-1
- Calculate the distance of the person from the cliff.
- After moving a certain distance from the cliff, he fires the gun again, and this time the echo is heard 1.5 s later than the first. Calculate the distance that the person moved.
