CBSE Class 11-science Answered

8th sum

Asked by lovemaan5500 | 24 Jan, 2019, 05:48: AM

Expert Answer

begin mathsize 12px style stack v subscript A with rightwards arrow on top space equals space 4 j with hat on top space space space space space space space space semicolon space space space space stack v subscript B with rightwards arrow on top space equals space minus 4 i with hat on top space space space semicolon space space space stack v subscript B with rightwards arrow on top space minus space stack v subscript A with rightwards arrow on top equals space minus 4 i with hat on top space minus 4 j with hat on top space space semicolon space open vertical bar space stack v subscript B with rightwards arrow on top space minus space stack v subscript A with rightwards arrow on top space close vertical bar space equals space square root of 4 squared plus 4 squared end root space almost equal to space 5.7 space m divided by s d i r e c t i o n space o f space space stack v subscript B with rightwards arrow on top space minus space stack v subscript A with rightwards arrow on top space i s space 45 degree space w i t h space minus v e space y minus a x i s space left parenthesis s o u t h minus w e s t right parenthesis end style

begin mathsize 12px style stack F subscript A space with rightwards arrow on top space equals space minus left parenthesis fraction numerator 0.02 cross times 4 cross times 4 over denominator 1 end fraction right parenthesis space i with hat on top space equals space minus 0.32 space space i with hat on top space space space semicolon space space space space space stack F subscript B space with rightwards arrow on top space equals space minus 0.32 space space j with hat on top space space semicolon space space stack F subscript B space with rightwards arrow on top space minus space stack F subscript A space with rightwards arrow on top space equals space minus 0.32 space space j with hat on top space plus space 0.32 space space i with hat on top open vertical bar space stack F subscript B space with rightwards arrow on top space minus space stack F subscript A space with rightwards arrow on top close vertical bar space equals space 0.32 cross times square root of 2 space space almost equal to space 0.45 N space space space comma space d i r e c t i o n space 45 degree space w i t h space y minus a x i s space a l o n g space s o u t h minus e a s t end style

Answered by Thiyagarajan K | 24 Jan, 2019, 11:58: AM

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