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CBSE Class 9 Answered

Define negative work.Give an example  Also define power and energy.
Asked by hridhyavijay | 10 Feb, 2019, 10:29: AM
answered-by-expert Expert Answer
When the work is done against some external force then we say we had done negative work with respect to external force.
Like when you pick a brick from ground the you are doing work to lift I up. So with respect to earth gravitation force we are doing negative work as you are applying force upward and gravitational force is acting downward.
Answered by Ankit K | 10 Feb, 2019, 05:13: PM
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CBSE 9 - Physics
Define negative work.Give an example  Also define power and energy.
Asked by hridhyavijay | 10 Feb, 2019, 10:29: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
 State what energy do the following objects possess: (i) A man climbing Mount Everest  ii) A stretched spring on the ground (iii) A man standing on the top of a building (iv) A formula one race car on a track  
Asked by Nimmi | 29 Jan, 2019, 02:22: PM
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Difference  between thrust and pressure 
Asked by Akshu.tayade9111 | 04 Feb, 2018, 09:54: AM
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