Advertisements
Advertisements
प्रश्न
A force F when acts on a body, displace it by a distance d in a direction at an angle θ with the direction of the force. Write down the expression for the work done by the force.
Advertisements
उत्तर
Work done by the force, W = Fd cos θ.
संबंधित प्रश्न
Give the expression for mechanical advantage of an inclined plane in terms of the length of an inclined plane.
When does a force do work?
What are the S.I. and C.G.S units of work? How are they related? Establish the relationship.
It takes 20 s for a person A of mass 50 kg to climb up the stairs, while another person B of same mass does the same in 15 s. Compare the power developed by the persons A and B.
State the condition when the work done by the force is positive
State the practical unit mainly used in mechanical engineering and write down its equivalent in watt.
Derive a relation between the S.I. and C.G.S. unit of force.
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)
