work done by a centripetal force is zero.why?
Asked by
20th December 2011,
2:31 PM
Answered by Expert
Answer:
Work = Force x displacement x cos 
As the centripetal force acts upon an object moving in a circle at constant speed, the force always acts inward as the velocity of the object is directed tangent to the circle. This would mean that the force is always directed perpendicular to the direction that the object is being displaced. The angle in the above equation is 90o and the cosine of 90o is 0. Thus, the work done by the centripetal force in the case of uniform circular motion is zero.
in the above equation is 90o and the cosine of 90o is 0. Thus, the work done by the centripetal force in the case of uniform circular motion is zero.
Answered by Expert
21st December 2011,
9:47 AM
Rate this answer
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
You have rated this answer /10
Your answer has been posted successfully!
RELATED STUDY RESOURCES :
KERALA Class-11-science QUESTION ANSWERS
Browse free questions and answers by Chapters
- 1 Units and Measurement
- 2 Motion in a Straight Line
- 3 Motion in a Plane
- 4 Laws of Motion
- 5 Work, Energy and Power
- 6 System of Particles and Rotational Motion
- 7 Gravitation
- 8 Mechanical Properties of Solids
- 9 Mechanical Properties of Fluids
- 10 Thermal Properties of Matter
- 11 Thermodynamics
- 12 Kinetic Theory
- 13 Oscillations
- 14 Waves
Trending Tags
Latest Questions
JEE Main Mathematics
Asked by amaladelsingh
28th October 2020,
10:24 PM
CBSE X Biology
Asked by reenacharan2008
28th October 2020,
9:11 PM
