Advertisements
Advertisements
рдкреНрд░рд╢реНрди
Find the kinetic energy of a body of mass 1 kg moving with a uniform velocity of 10 m s-1.
Advertisements
рдЙрддреНрддрд░
Mass, m = 1kg
Velocity, v = 10m/s
Kinetic energy = 1/2 ×ЁЭСЪЁЭСОЁЭСаЁЭСа ×(ЁЭСгЁЭСТЁЭСЩЁЭСЬЁЭСРЁЭСЦЁЭСбЁЭСж)2
= 1/2 ×1 ×(10)2= 1/2 ×1 ×100
= 50J
рд╕рдВрдмрдВрдзрд┐рдд рдкреНрд░рд╢реНрди
Define work.
What happens to the work done when the dispacement of body is at right angles to the direction of force acting on it? Explain your answer.
What is the ratio of SI units to CGS units of 'work'?
Complete the following sentences:
Joule is the unit of .......
If an electric bulb of 100 watt is lighted for 2 hours, how much electric energy would be consumed?
Calculate the amount of work done by a child carrying a bag of 20 kg when he moves a distance of 40 m in
(a) Vertical direction, and
(b) Horizontal direction
How is horse power related to the S. I. unit of power?
A force of F = (5y + 20) `hat"j"` N acts on a particle. The work done by this force when the particle is moved from y = 0 m to y = 10 m is ______ J.
