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CBSE Class 9 Answered

Please provide the solution to question no 8 with proper explanation 
Asked by adityaahuja099 | 15 Nov, 2017, 08:47: PM
answered-by-expert Expert Answer
 
 
 
begin mathsize 16px style C a r space i s space m o v i n g space w i t h space u n i f o r m space v e l o c i t y comma space s o space a c c e l e r a t i o n space o f space t h e space c a r space i s space z e r o F r i c t i o n space a c t s space i n space o p p o s i t e space d r i e c t i o n space o f space m o t i o n comma space s o space r e t a r d a t i o n space d u e space t o space f r i c t i o n space i s space g i v e n space a s space F equals m a space semicolon space 50 equals 1000 x a 50 over 1000 equals a a equals 5 x 10 to the power of negative 2 end exponent space m divided by s squared space space space w o r k space d o n e space f o r space a space d i s tan c e space o f space 1 k m equals space F x s equals m a x s equals 1000 x 5 x 10 to the power of negative 2 end exponent x 1000 equals 5 x 10 to the power of 4 space J end style
Answered by Gajendra | 07 Dec, 2017, 02:32: PM

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CBSE 9 - Physics
If person A reaches the 2nd floor Of a shopping mall by lift and Person B reaches the same floor by stairs and both their masses are same. Is work done by person B is greater than Person A  against gravitational force.Justify your answer
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CBSE 9 - Physics
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CBSE 9 - Physics
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CBSE 9 - Physics
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CBSE 9 - Physics
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CBSE 9 - Physics
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CBSE 9 - Physics
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CBSE 9 - Physics
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