Physics Board Examination

Jun 17th, 2015
Studypool Tutor
Price: $10 USD

Tutor description

1. Two conducting spheres of radii r1 & r2 are at same potential. What is the ratio of charges on the spheres?. 2. Why do we use nitrogen or methane gas in Van-de-Graff generator ? 3. does the drift velocity of electrons in a metallic conductor change, if the length of the conductor is doubled by stretching it

Word Count: 9374
Showing Page: 1/4
Work energy and powerIn general work is said to done when a body moves in a certain distance when force is applied to thatbody.Work:The work done by a force acting on the body is defined as the product of the force and the displacementof the body in the direction of the force.Constant Force :If the force is constant and it displaces the body through a distance (s) in the same direction, then workdone.W=FaBut if the displacementmakes an anglethe direction of force; thenwithConstant forcecomponent of displacement along the direction of force =so,work done by the force ,W=Fsi.e. the work done by a force is the scalar product of the force vector and displacement vector.2. Variable Force :If the force is variable, then for infinitely small displacement, the force is assumed constant, so the workdone during small displacementd W = F dx (one dimensional form)Then total work is joined by adding such small amounts of workThis is found in two ways :(i) By integration :Let body be displaced fromAndGraph of integration(ii) By graphical method :If a graph is plotted between force F and displacement x, then work done by the force from= Area enclosed by

Review from student

Studypool Student
" Goes above and beyond expectations ! "
Ask your homework questions. Receive quality answers!

Type your question here (or upload an image)

1831 tutors are online

Other Documents

06/17/2015
06/17/2015
06/17/2015
06/17/2015

Brown University





1271 Tutors

California Institute of Technology




2131 Tutors

Carnegie Mellon University




982 Tutors

Columbia University





1256 Tutors

Dartmouth University





2113 Tutors

Emory University





2279 Tutors

Harvard University





599 Tutors

Massachusetts Institute of Technology



2319 Tutors

New York University





1645 Tutors

Notre Dam University





1911 Tutors

Oklahoma University





2122 Tutors

Pennsylvania State University





932 Tutors

Princeton University





1211 Tutors

Stanford University





983 Tutors

University of California





1282 Tutors

Oxford University





123 Tutors

Yale University





2325 Tutors