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

Explain using newtons laws, An army plane wants to drop supplies to a group...

An army plane wants to drop supplies to a group of physics students stranded on an island. In order for the package to land on the island, the pilot needs to drop the package befor

# ELECTRONICS, #WHAT IS THE PRINCIPLE OF REGULATOR?

#WHAT IS THE PRINCIPLE OF REGULATOR?

Total polarization, In the presence of electronic, ionic and dipolar polari...

In the presence of electronic, ionic and dipolar polarization mechanisms, t he average induced  dipole moment per molecule will be the sum of all the contributions in terms of the

Curie point, It describes the temperature above which the material loses it...

It describes the temperature above which the material loses its spontaneous polarization and piezoelectric characteristics.

Motion in two dimensions, Motion of an object in a plane is known two dimen...

Motion of an object in a plane is known two dimensional (2-D) motions. For 2-D motion acceleration or velocity can be defined by two elements in any two mutually perpendicular dire

What speed does it collide into the other sphere, Two flawlessly conducting...

Two flawlessly conducting spheres are in an evacuated region of space. One is at a potential of 12 volts as well as the other is at a potential of 15 volts. A free electron is rele

Can a solid and liquid together be possible, Can a solid and liquid togethe...

Can a solid and liquid together be possible? Actually, substances can exist in all three states of matter concurrently if the conditions are right. The triple point of a substa

Zener diode, its characteristic and working

its characteristic and working

AND GATE, types of ANDGATE circuit and gate operation

types of ANDGATE circuit and gate operation

Electric, Find the electric field between the plates of a capacitor given t...

Find the electric field between the plates of a capacitor given the following:? (1) C= 10pF (2) the capacitor is connected to a 25 V battery (3) there is a vacuum between the capa

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