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

Determine the magnitude of the acceleration, A ball is thrown vertically up...

A ball is thrown vertically upwards from the ground with a speed of 80 feet/second.  In the English system of units, Determine the magnitude and direction of the acceleration

Three phase system over single phase system, Advantages and disadvantages o...

Advantages and disadvantages of three phase system over single phase system    1. In a single phase circuit the power distributed is pulsating. In three-phase system the total

Periodic and non periodic, how are digital signal are periodic and non peri...

how are digital signal are periodic and non periodic signal

Do fibers have losses, Do fibers have losses? Everything in the univers...

Do fibers have losses? Everything in the universe is inefficient. It means that while a measured amount of something enters in a system, less comes out than initially went in.

State about the term- voltage gain, Determine voltage gain for the circuit...

Determine voltage gain for the circuit shown in figure below, with R F = 100K ? and R 1 =10 K?   Ans. Determination of voltage gain: The provided operational

Preliminary process flow diagram-thermo, Task description You are taske...

Task description You are tasked with completing the preliminary design of a plant for the production of dimethyl ether from methanol. This task involves a complete material and

Conservation of angular momentum, A figure skater who while spinning in pla...

A figure skater who while spinning in place drag her arms in to increase her rotational speed is most closely exhibiting which of the following Answer:- a) Conservation of

Uses of radar, Uses of Radar: Radar is used to locate and recognize war...

Uses of Radar: Radar is used to locate and recognize war planes and missiles, to guide ships or submarine to see position of a satellite in space.

Magnetism, how to find neutral point in a system of magnets

how to find neutral point in a system of magnets

Determine average kinetic energy of each type of molecule, Determine the av...

Determine the average kinetic energy of each type of molecule? A cylinder contains a mixture of helium and argon gas in equilibrium at temperature of 149°C. (a) What is the a

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