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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
APPLICATIONS OF NEWTON'S LAWS - II 1. As the body moves through the body it displaces the fluid. It has to exert a force on the fluid to push it out of the path. By the Newto
A dual-wavelength spectrometer uses 780 nm and 830 nm. The molar extinction coefficients for oxy-hemoglobin (HbO 2 ) and deoxy-hemoglobin (Hb) at these two wavelengths are: e_HbO 2
refractive index of the transparent liquids using prism and spectrometer
Two positive lens L 1 and L 2 has the same focal length f>0. The distance between them is f/2. L 1 is placed to the left of L 2 . (a) An object is placed to the left of L1 wi
How can you differentiate between circularly polarised light and unpolarized light?
what, why, use
The dimentional formula of frequency T -1
When two particles tend to each other, their motion alters or their momentum modify because of their mutual interactions. This phenomenon is called as collision. During collision
how to solve it
P r oblem Solving Technique There are two approaches to solve a problem. They are:- 1. Top down -A top down design approach starts by identifying the major components
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