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प्रश्न
State one way to obtain greater moment of a given force about a given axis of rotation.
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उत्तर
In order to generate the maximum torque to turn the body, the force is applied at a position on the body where the line of action's perpendicular distance from the axis of rotation is maximum.
संबंधित प्रश्न
A force always produces both the linear and turning motions.
Moment of force =............... × distance of force from the point of turning.
In a door, handle is provided ......... from the hinges.
Thrust is the ............ force acting on a surface.
Match the column
| Column A | Column B |
| (a) Camel | (1) broad and deep foundation |
| (b) Truck | (2) broad feet |
| (c) Knife | (3) six or eight tyres |
| (d) High building | (4) sharp cutting edge |
| (e) Thrust | (5) atm |
| (f) Moment of force | (6) N |
| (g) Atmospheric pressure | (7) N m |
State the effect of force F in of the following diagram.
The steering wheel of a vehicle is of large diameter.
A potter turns his wheel by applying a force through the stick near the rim of wheel.
A wheel of diameter 2 m can be rotated about an axis passing through its center by a moment of force equal to 2.0 Nm. What minimum force must be applied on its rim?
The spanner (or wrench) has a long handle.
A car of mass 600 kg is moving with a speed of 10 ms-1 while a scooter of mass 80 kg us moving with a speed of 50 ms-1. Compare their momentum.
A body is acted upon by two forces of magnitude F but in opposite directions. State the effect of the force if both forces act at the same point of the body.
Explain the motion of a planet around the sun in a circular path.
Classify the following amongst contact and non-contact forces.
normal reaction force,
State two factors on which moment of the force about a point depends.
Clockwise moment produced by a force about a fulcrum is considered to be ______.
A door lock is opened by turning the lever (handle) of length 0.2 m. If the moment of force produced is 1 Nm, then the minimum force required is ______.
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.
