Advertisements
Advertisements
Question
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.
Solution
Power developed by the persons A and B is
`p_1/p_2 = ((mgh)/t_1)/((mgh)/t_2) = t_2/t_1 = 15/20 = 3:4`
APPEARS IN
RELATED QUESTIONS
How is work done by a force measured when the force is in the direction of displacement?
Give the expression for mechanical advantage of an inclined plane in terms of the length of an inclined plane.
kWh is the unit of ______.
Name the quality which is measured in Wh.
What is meant by a rotatory motion? Give one example.
What do you understand by the clockwise and anti clockwise moment of force?
What do you mean by uniform circular motion?
What is a centripetal force?
State and define the unit of force in the S.I. system.
A force of 1 kgf displaces a body by a distance of 10 cm
(i) in direction of force,
(ii) normal to the force
(iii) at an angle of 60° to the direction of the force.
Calculate the amount of work done in each case. (Take: g = 9.8 ms−2 )
