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A body of mass 2 kg thrown vertically upwards with a velocity 40 m/s comes to instantaneous rest at a height 50 m. Is there any other force (other than gravitational force), if yes then calculate the value. Ans) Yes , a force due to air drag will be there , to calculate this wehave to first find work done by air drag..Acc. To work-energy theoremWgravity + Wair drag = change in K.E.-Mgh +Wair drag = change in K.E.Wair drag =change in K.E. +mgh=[0-1/2mu2] +mgh = -1/2 x 2 x (40)2 + 2x 10 x 50 = -1600+1000 = -600Jnow w.d. = F x sF= -600/50 = -12N
Q. What is the Newton meter? Answer:- A unit of energy is as well known as a Joule. When a force of 1 Newton is used on an object for a distance of 1 meter then 1 Joule of
A uniform ring has a radius R with centre C. A nd B are 2 pts on the circumference.such that angle theta is 60 0 .find the equivalent resistance between pt A and B? solution) le
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1. Consider two monoenergetic photon beams with the same photon fluences. In one beam the photons are 100 keV and in the other they are 1 MeV. Determine the most appropriate relati
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