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CBSE Class 11-science Answered

a body travels from A to B at 40m/s and from B to A at 60m/s. calculate the average speed and average velocity of the object.
Asked by mahimahalder374 | 19 Aug, 2020, 01:40: PM
answered-by-expert Expert Answer
Average speed  = Total distance travelled/ total time taken 
 
Thus, 
A v e r a g e space s p e e d space equals space fraction numerator 2 V subscript 1 V subscript 2 over denominator V subscript 1 space plus V subscript 2 space end fraction space equals space fraction numerator 2 open parentheses 40 cross times 60 close parentheses over denominator 40 plus 60 end fraction space equals space fraction numerator 2 cross times 2400 over denominator 100 end fraction space equals space 48 space m divided by s  
Average velocity is given as, 
A v e r a g e space v e l o c i t y space equals space fraction numerator T o t a l space d i s p l a c e m e n t over denominator T o t a l space t i m e space t a k e n space end fraction A s space t h e space i n i t i a l space p o s i t i o n space a n d space f i n a l space p o s i t i o n space o f space t h e space b o d y space i s space s a m e space t h e space d i s p l a c e m e n t space o f space t h e space b o d y space i s space z e r o. space A s space t o t a l space d i s p l a c e m e n t space equals space 0 space A v e r a g e space v e l o c i t y space equals 0 space
Answered by Shiwani Sawant | 19 Aug, 2020, 02:22: PM

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