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ICSE Class 9 Answered

tell me
Asked by bishnoiladla | 06 Jul, 2020, 10:17: AM
Expert Answer
a girl walks along a straight path to drop a letter in the letterbox and comes back to her initial position. 
 
 
F r o m space g r a p h comma space
I n i t i a l space t h e space g i r l space s t a r t s space f r o m space r e s t
T h u s comma space
d i s p l a c e m e n t space equals space 0 space
t i m e space equals space 0 space
H e n c e space v e l c o i t y space i s space 0
W h e n space t i m e space t space equals space 50 space s space
D i s p l a c e m e n t space equals space 100 space m space
H e n c e comma space
t h e space v e l o c i t y space a t space t h i s space i n s tan c e space i s comma space
v space equals s divided by t space equals space 100 divided by 50 space equals space 2 space m divided by s space
W h e n space t space equals space 100 s space
d i s p l a c e m e n t space i s space z e r o space a s space t h e space g i r l space r e t u r n s space t o space h e r space i n i t i a l space p o s i t i o n. space
T h u s space v e l o c i t y space a t space t h i s space i n s tan c e space i s space z e r o. space
B a s e d space o n space t h i s space w e space c a n space d r a w space t h e space v e l o c i t y space minus space t i m e space g r a p h space a n d space i t s space i s space a s space f o l l o w s colon space minus space
 
Answered by Shiwani Sawant | 06 Jul, 2020, 09:41: PM
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