Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
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
संबंधित प्रश्न
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.
A body is moved in a direction opposite to the direction of force acting on it. State whether the work is done by the force or work is done against the force
One horse power is equal to ______.
State the principle of moments.
State and define the unit of force in the S.I. system.
What do you understand by work? Is work a scalar or a vector quantity?
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.
State the S.I. and C.G.S. units of energy. How are they related?
For the following scenario, state whether the work done by gravity is positive, negative, or zero.
A car in neutral gear is coming down the slope.
