Advertisements
Advertisements
प्रश्न
Sleepers are used below the rails.
Advertisements
उत्तर
Sleepers are laid below the rails to reduce pressure (force/area) on the ground.
∴ Sleepers increase the area.
APPEARS IN
संबंधित प्रश्न
Define force.
State the S.I. unit of moment of force.
The hand flour grinder is provided with a handle near the rim.
State one way to obtain greater moment of a given force about a given axis of rotation.
What are non-contact forces? Give two example
State the relationship between force, mass and acceleration. Draw graphs showing the relationship between Acceleration and force for a constant mass.
One joule is the amount of work done when a force of ......... moves a body through a distance of .......
State when the moment of force is positive and when it is negative.
The perpendicular distance between the point of application of force and turning point is 1.75 m when a force of 80 N acts on a rigid body. Calculate the moment of force.
A person standing in front of a cliff fires a gun and hears its echo after 3 s. 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.
