Work and Energy numericals Class 9 CBSEFull description
Mind maps are acknowledged as scientific & effective learning tool worldwide. They give a snapshot of each chapter, presented in a flow chart that highlights the important concepts in the chapter l...
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Mind maps are acknowledged as scientific & effective learning tool worldwide. They give a snapshot of each chapter, presented in a flow chart that highlights the important concepts in the chapter l...
Mind maps are acknowledged as scientific & effective learning tool worldwide. They give a snapshot of each chapter, presented in a flow chart that highlights the important concepts in the chapter l...
Mind maps are acknowledged as scientific & effective learning tool worldwide. They give a snapshot of each chapter, presented in a flow chart that highlights the important concepts in the ch…Full description
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CBSE CLASS IX PHYSICS MOTION: It contains completes notes with solved numericals, objective type of questions and much more.
Mind maps or Concept Maps are acknowledged as scientific & effective learning tool worldwide. They give a snapshot of each chapter, presented in a flow chart that highlights the important co…Full description
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Work Power and Energy - 12 - Part 1
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physics class 12 cbse practical reading. i'll provide readings of experiments which was done by me in school. it contains observations, calculations, table and conclusion. i have also prov…Full description
PHYSICS-ASSIGNMENT Chapter: Work Work and Energy
Class: IX
Anser the !ollo"ng:
1. Explain Explain the work work done by the constant constant force, force, when the the direction direction of the the force and displacement may be – i) same ii) opposite iii) perpendicular to each other, iv) there may not be displacement at all 2. A coolie coolie with with a suitcase suitcase on his head is climbin climbin up on a ladder with uniform uniform speed. speed. Explain the work done by the coolie on the suitcase. !. "r "rite ite the the factors factors on which which kinetic kinetic enery enery of the the body depends. depends. #. "hich would would have a reater reater effect effect on kinetic enery enery of an ob$ect, ob$ect, doublin doublin the mass or doublin the velocity% &. 'ive 'ive one examp example le of each each the foll followi owin n i) when body possess kinetic enery ii) when body possess potential enery iii) when body possess both, kinetic enery as well as potential enery. (. wo bodi bodies es A and # of e*ual masses are kept at heihts of hand 2h respectively. "hat will be the ratio of their potential enery% +. wo bodi bodies es A and # of e*ual masses are movin with uniform speed of v and 2v respectively. "hat will be the ratio r atio of their kinetic enery% Sol$e the !ollo"ng:
1. A body body of mass 2 k is thrown verticall vertically y upwards with with an initial velocit velocity y of 2m-s. 2 "hat will be its potential enery at the end of 2s%/ 0.m-s ) Answer #3) 2. A man drops a 1 k rock rock from the the top of a & m ladder. ladder. "hat "hat is its speed speed $ust before before it hits the round% "hat is its kinetic enery when it reaches the round% / 1m-s 2) Answer &3) !. A boy weihin weihin # # k makes makes a hih $ump $ump of #m. #m. /1m-s /1m-s2) i) "hat is his kinetic enery at the middle of the hih $ump% ii) "hat is his potential enery at the hihest point% Answer 3, 1(3) #. A man exerts exerts a force of 24 in pullin pullin a cart at a constant constant speed speed of 1(m-s. 1(m-s. 5alculate the power spent by the man. Answer !.2k" ) &. A ( k person climbs climbs stairs stairs of total total heiht heiht 2m in 2 min. min. 5alculate 5alculate the the power delivered. Answer 1") (. An electric electric bulb of ( " is use used d for (h per day. 5alculate 5alculate the 6units7 6units7 of enery enery 2 consumed in one day by & such bulbs. /1m-s ) Answer 1 units)
