Q. 34.4( 5 Votes )

Identify the wron

Answer :

a) Work and Energy have same unit joule(J),


Work is defined as W = Force Displacement ,its unit came out be Newton-metre or precisely Kg.--- (i)
Same thing with Energy , let us take Kinetic Energy ,it is given by the formula
m


where m is mass of the object in kg


v is the velocity of the object in m/s,


now putting the value of m and v in SI units we will get Kinetic Energy Units as Kg


which is same as of the units of work given in Eq-(i) ,hence proved they have same units.


b) Work done by its weight is negative as the weight is acting downward and plane is going upward.


c) When we try to extend or compress spring we increases its energy and this energy is stored as potential energy and when we release spring it loses its potential energy to do some work.


d) External negative force acting on a system decreases it energy because it acts opposite to the direction of motion of object .for example when friction acts on a object it gradually lowers its velocity .


e) freely falling body loses its potential energy into kinetic energy. So, as potential energy decreases kinetic energy increases .


f) unit of power is joule/second(Watt). Power is defined as rate of change of energy per unit time.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Sphere and HemisphereSphere and HemisphereSphere and Hemisphere42 mins
Introduction to Lines and AnglesIntroduction to Lines and AnglesIntroduction to Lines and Angles60 mins
Speed and VelocitySpeed and VelocitySpeed and Velocity42 mins
Surface Area and Volume of solids RevisionSurface Area and Volume of solids RevisionSurface Area and Volume of solids Revision43 mins
Arc of Circle And Related IMP QsArc of Circle And Related IMP QsArc of Circle And Related IMP Qs40 mins
IMP Theorems  And Their ApplicationIMP Theorems  And Their ApplicationIMP Theorems And Their Application43 mins
Circles- All kinds of QuestionsCircles- All kinds of QuestionsCircles- All kinds of Questions36 mins
Variation in g due to Height and DepthVariation in g due to Height and DepthVariation in g due to Height and Depth33 mins
Trigonometric Identities - Marathon Part 1Trigonometric Identities - Marathon Part 1Trigonometric Identities - Marathon Part 146 mins
Test what you Know QuizTest what you Know QuizTest what you Know Quiz44 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

Identify the wronAP - Physics & Chemistry

A man carrying a AP - Physics & Chemistry