Advertisements
Advertisements
प्रश्न
What do you understand by the clockwise and anti clockwise moment of force?
Advertisements
उत्तर
If the turning effect on the body is clockwise, moment of force is called the clockwise moment and is taken as negative.
If the turning effect on the body is anticlockwise, moment of force is called the anticlockwise moment and is taken as positive.
संबंधित प्रश्न
A boy weighing 40 kgf climbs up a stair of 30 steps each 20 cm high in 4 minutes and a girl weighing 30 kgf does the same in 3 minutes. Compare:
- The work done by them.
- The power developed by them.
A stone of mass m is rotated in a circular path with a uniform speed by tying a strong string with the help of your hand. Answer the following questions
1) Is the stone moving with a uniform or variable speed?
2) Is the stone moving with a uniform acceleration? In which direction does the acceleration act?
3) What kind of force acts on the hand and state its direction?
State and define the S.I. unit of work.
State the condition when a force produces
(i) linear motion.
(ii) rotational motion, in a body.
Name the force needed for circular motion. What is the direction of the force?
Work is a scalar quantity because it is a measure of transfer of energy without indicating any direction
How is 1 kgf related to the SI unit of force?
A machine raises a load of 750 N through a height of 16 m in 5 seconds. Calculate the power at which the machine works.
A coolie carries a load of 30 kgf through a distance of 500 m in 5 minutes while another coolie B carries the same load through the same distance in 10 minutes. Compare the
(i) work done, and
(ii) power developed. (Take: g = 10md−2)
