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

Examine application of thin film technology, 1) Examine a particular thin f...

1) Examine a particular thin film system in some depth -review the literature. Ag deposited on GaAs Al deposited on Si Fe/Cr/Fe multilayer structures   2) E

Explain about the crystalline solids in short, Explain about the crystallin...

Explain about the crystalline solids in short. Crystalline solids: A solid possesses rigidity with a definite geometric pattern. Illustrations: Iron, silver, copper an

Acceleration, Ascooter acquires velocity of 36km/hr in 10 secs just after t...

Ascooter acquires velocity of 36km/hr in 10 secs just after the start and stops after 20 secs. Find the acceleration in both cases.

State the working of Unijunction Transistors, State the Working of UJT ...

State the Working of UJT    Make  circuit  arrangement  as  demonstrated in  fig.(c),  where  UJT  is represented  by  its  equivalent  circuit  comprising resistances  R B1

Which has additional rotational kinetic energy, Which has additional rotati...

Which has additional rotational kinetic energy an object with a rotational inertia of 4 kg·m 2 and an angular velocity of 8 rad/s or else an object with a rotational inertia of 8

Illustrate the term semiconductor laser, Illustrate the term semiconductor ...

Illustrate the term semiconductor laser. Semiconductor Laser (Laser diode): It is a laser wherein semiconductors (characteristically direct band-gap semiconductors) can be u

Determine the total reluctance of the circuit, A ring forming a magnetic ci...

A ring forming a magnetic circuit is made from two materials; one part is mild steel of mean length 25cm and cross-sectional area 4cm 2 , and the remainder is cast iron of mea

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