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

Uncertainty principle, Uncertainty principle (W. Heisenberg; 1927): A ...

Uncertainty principle (W. Heisenberg; 1927): A principle, central to quantum mechanics, that states two complementary parameters (such as position & momentum, energy & time, o

Magnetic induction heating, what project can i make that includes induction...

what project can i make that includes induction heating

Maximum power transfer in dc circuit, Maximum power transfer: Every sou...

Maximum power transfer: Every source of EMF has internal resistance.  If it is required to develop the maximum possible amount of power in an external load, then the load resis

What is the maximum possible focal length of the lens, Q. The image of a sm...

Q. The image of a small electric bulb fixed on the wall of a room is to be obtained on the opposite wall ma way by means of a large convex lens. What is the maximum possible focal

Dielectrics, a parallel pate capacitor has two dieletric slabs between the ...

a parallel pate capacitor has two dieletric slabs between the plates with interface normal to E and D.the thickness of each slab is 1cm,area is 100cm2.neglect fringing effects.dete

What is free potential, Potential free contacts (also known as "dry contact...

Potential free contacts (also known as "dry contacts") are simply contacts which are physically operated with the main device, but not electrically connected to it. For example a m

Attraction & repulsion of atom, Attraction & repulsion of atom: It can ...

Attraction & repulsion of atom: It can be observed, that if two negatively charged bodies are brought together, there is a force of repulsion between them. Similarly if two p

What is the slit separation, Light with a wavelength of 454.5 nm passes by ...

Light with a wavelength of 454.5 nm passes by two slits that are 95.2 cm from a screen. The distance among the centers of the central band and the first-order band is 15.2 mm.

Define about the heat loss, Define about the Heat Loss? An immersion h...

Define about the Heat Loss? An immersion heater of power J=500 W can be used to heat water in a bowl. After 2 minutes the temperature enhance from T 1 =85 o C to T 2 =90°C. Th

Atomic and nuclear physics, is it possible for an element to have different...

is it possible for an element to have different types of atoms/Explain/

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