Advertisements
Advertisements
प्रश्न
Under what condition will a set of gears produce a gain in torque.
Advertisements
उत्तर
When the number of teeth in driven gear is more than the number of teeth in driving gear.
संबंधित प्रश्न
Moment of force = force × perpendicular distance of force – from the pivoted point.
State the effect of force F in of the following diagram.

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 ms-1 while a scooter of mass 80 kg us moving with a speed of 50 ms-1. Compare their momentum.
It is easier to turn the steering wheel of a large diameter than that of a small diameter. Given reason.
A wheel of diameter 3 m is shown in fig. 2 with axle at 0. A force F = 8 N is applied at Q in the direction shown in figure. Calculate the moment of force about:
(i) centre o, and
(ii) point p.

Clockwise moment produced by a force about a fulcrum is considered to be ______.
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.
