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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
example of rigid body
The temp gradient is similar to finding the slope of a line (when in two dimensions) Temp. Gradient= Change in Temp. value/Distance. dT/dx = (T2 - T1)/(X2 - X1)
A board with a number of green, blue and red coloured switches is normally seen near the entrance of each house . What is the purpose of this board? What is the difference a
Explain displacement x(t) is known as displacement and it denotes the position of a body at time. If the displacement is positive then that body is to the right of the chosen
The number of electrons in one molecule of are: (1)22 (2)44 (3)66 (4)88 Ans: 22
Yes magnetism more important for iit because the weight of this magnetism is very hign so be careful about this magnetism chapter All the best for your preparation
how to write aasignment on importance of physics
Q. Assume an economy is in a liquidity trap. A. Write an equation expressing interest rate parity under a fixed exchange rate regime. Answer: Liquidity trap entail R = 0
Q. W hat will be effect on Newton's rings if; (i) A little oil (µ = 1.65) is introduced between the lens (µ - 1.5) and the glass plate (µ = 1.75). (ii) A Pla
Illustrates the research of electron microscopy? Research in electron microscopy includes: a. Materials qualification b. Electron beam induced deposition, and materials a
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