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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. Transformation of kinetic energy to potential energy? A tiny ball at the end of string is swung in a circular vertical loop. The speed of rotation is reducing to the point t
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According to uncertainity stationary orbits are accepted or not?please give reason Ans) According to uncertainity stationary orbits are not accepted because according to station
It appears the intensity will be maximized at that positions where path dissimilarity is an integral multiple of wavelength these points are called as points of constructive inter
term paper for voltaic cell
Advantages of three phase system over single phase system a) Rotating magnetic field can be set up, by passing three-phase current by stationary coils. b) Polyphase s
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Assume that the column is a homogeneous circular cylinder with small cross sections loaded by its own weight. The free end of the column will bend away when its height exceeds a ce
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Q Define: mobility. Give its unit. The mobility is defined as the drift velocity obtains per unit electric field. The unit of a mobility m 2 V 1s 1.
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