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

Difference between the atomic theory and the kinetic theory, What is the di...

What is the difference between the Atomic Theory and the Kinetic Theory? Atomic theory is all about structure of an atom, i.e., its composition. Like an atom in general is made

What is non-inertial frame of reference, NON-INERTIAL FRAME OF REFERENCE: ...

NON-INERTIAL FRAME OF REFERENCE: A frame which has non-uniform motion but particular acceleration is known as non-inertial frame of reference. Newton's first law of motion i

Electronics, characteristics of schottky diode

characteristics of schottky diode

Capacitors, What are capacitors used for in induction coils

What are capacitors used for in induction coils

Explain the term capacitance of a capacitor, (a)   Explain the term 'capaci...

(a)   Explain the term 'capacitance' of a capacitor. Derive an expression for the total Capacitance of 'n' capacitors arranged in series. (b)   Explain the term 'capacitance' of

Make a linear relationship between flow and lift, Cooling water flows throu...

Cooling water flows through a jacketed reactor and is controlled by a valve. The cooling water flow rate through the jacket obeys the following relation: where the pres

What is the electric field strength, Two parallel plates having a p.d. of 2...

Two parallel plates having a p.d. of 200V among them are spaced 0.8mm apart. What is the electric field strength? Find also the flux density when the dielectric among the p

Distillation column design, A mixture of methanol and water is to be separa...

A mixture of methanol and water is to be separated in a new separation unit and you are required to provide a report detailing the design and costing of a distillation column with

What is the area of the surface of water through, A small bulb is placed at...

A small bulb is placed at the bottom of a tank containing water to a depth of 80 cm. What is the area of the surface of water through which light from the bulb can emerge out? Refr

Determination of packing fraction of diamond, Determination of packing frac...

Determination of packing fraction of diamond  The co-ordination number of an atom in diamond structure is 4 as can be seen from the unit cell of diamond and is loosely packed.

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