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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
Less force is needed when applied at a farther distance from the pivoted point.
State two effects of a force when applied on a body.
How does the effect of force differ when it is applied on a non-rigid body?
In Fig. a force F is applied in a direction passing through the pivoted point O of the body. Will the body rotate? Give reason to support your answer.
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?
A car of mass 600 kg is moving with a speed of 10 m-1 while a scooter of mass 80 kg is moving with speed of 50 m s-1. which vehicle will require more force to stop it in the (1) same interval of time (2) same distance
State two factor on which moment of force about a point depends.
It is easier to turn the steering wheel of a large diameter than that of a small diameter. Given reason.
The moment of a force about axis depends ______.
The moment of a force of 10 N about a fixed point O is 5 N m. Calculate the distance of the point O from the line of action of the force.
A uniform metre scale can be balanced at the 70.0 cm mark when a mark when a mass 0.05 kg is hung from the 94.0 cm mark
- draw a diagram of the arrangement
- Find the mass of the metre scale
Explain the motion of a planet around the sun in a circular path.
Define couple.
Fig. shows a uniform meter scale weighing 100 N pivoted at its centre. Two weights of 500 N and 300 N are hung from the ruler as shown in fig.
(i) Calculate total clockwise and anticlockwise moments.
(ii) Calculate difference in clockwise moment and anticlockwise moment.
(iii) Calculate the distance from O where a 100 N weight should be suspended to balance the meter scale.
State whether the moment of force is a scalar or vector quantity?
Calculate the length of arm of couple, if a force of 13 N produces a moment of couple of 14.3 Nm.
The diagram shows wheel O pivoted at point A. Three equal forces F1, F2 and F3 act at point B on the wheel.
- Which force will produce maximum moment about A?
- Give a reason for your answer in (a).
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.
