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Find the time they take to cross each other in the given figure.

Find the time they take to cross each other in the given figure.

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Grade:12th pass

1 Answers

Vikas TU
14149 Points
6 years ago
Dear Student,
The initial velocity=u=0
distance they will cover is = 7m
 tension in the string=T

FBD of 4kg block
4a+T=4g
=>a-g=T/4-----1

FBD of 1kg block
a+g=T-------2

Adding 1 and 2
2a=5T/4
Substituting a in 1 we get T=8g/3
Subsequently, a = 5g/3

S=ut+at2/2
=>7=5gt2/6
=>t=0.92s
Cheers!!
Regards,
Vikas (B. Tech. 4th year
Thapar University)

 

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