Gravitational force, Physics

Assignment Help:

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 theorem

Wgravity + 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 = -600J

now w.d. = F x s

F= -600/50 = -12N


Related Discussions:- Gravitational force

Define two-dipole interaction, Define Two-Dipole Interaction? Two class...

Define Two-Dipole Interaction? Two classical dipoles with dipole moments μ 1 and μ 2 are separated by a distance R so that only the orientation of the magnetic moments is fre

Explain the principle of particle detection, Explain the principle of parti...

Explain the principle of particle detection. Draw log n -V graph showing different regions and discuss the significant physical processes taking place in these regions.

Time base control 2, Time Base Control 2 Shows the effect of modifying ...

Time Base Control 2 Shows the effect of modifying the time base control on the show while there is an input voltage varying in time.

Huygens wave theory, Huygens wave theory: Huygen's wave theory is not c...

Huygens wave theory: Huygen's wave theory is not correct in all respects. 2. It assumes simply that light energy is propagated as a wave. 3. At the time of his proposition

What is photo-voltaic cell, It having of a Cu plate coated with a thin laye...

It having of a Cu plate coated with a thin layer of cuprous oxide (Cu2O). On this plate is laid a semi transparent thin film of silver. When light fall, the electrons emitt

Write down gauss law in electrostatics, Write down Gauss law in electrostat...

Write down Gauss law in electrostatics. get its differential form in vacuum.

Calormetry, in water equivalent how the temperature or water and solid equa...

in water equivalent how the temperature or water and solid equal?

What occurs to the width of the central, Question: In diffraction exper...

Question: In diffraction experimentation monochromatic light which passes through a single slit illuminates a screen. A pattern of fringes seems on the screen. The pattern comp

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd