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प्रश्न
State two factors on which affect moment of force.
State the factors on which the moment of force depends.
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उत्तर
Factors on which moment of force depends
- The magnitude of the force applied.
- The distance of the line of action of the force from the axis of rotation.
संबंधित प्रश्न
How does the magnitude of this non-contact force on the two bodies depend on the distance of separation between them?
Moment of force =............... × distance of force from the point of turning.
In a door, handle is provided ......... from the hinges.
State the S.I. unit of moment of force.
The steering wheel of a vehicle is of large diameter.
Find the moment of force of 20 N about an axis of rotation at distance 0.5 m from the force.
The spanner (or wrench) has a long handle.
State one factor on which the magnitude of a non-contact force depends. How does it depend on the factor stated by you?.
Name of S.I. unit of the rate of change in momentum.
A body X of mass 5 kg is moving with velocity 20 m s-2 while another body Y of mass 20 kg is moving with velocity 5 m S-1. Compare the momentum of the two bodies.
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.
State two factor on which moment of force about a point depends.
The diagram shows two forces F1 = 5 N and F2 = 3N acting at point A and B of a rod pivoted at a point O, such that OA = 2m and OB = 4m
Calculate:
- Moment of force F1 about O
- Moment of force F2 about O
- Total moment of the two forces about O.
Two forces each of magnitude 10 N act vertically upwards and downwards respectively at the two ends A and B of a uniform rod of length 4 m which is pivoted at its midpoint O as shown in the figure. Determine the magnitude of the resultant moment of forces about the pivot O.
Give an example for each of the following uses of a machine:
to change the point of application of force
What is meant by the term ‘moment of force’? If the moment of force is assigned a negative sign then will the turning tendency of the force be clockwise or anti-clockwise?
State the effects that a force can produce. Given one example of each.
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.
