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Grade 12Mechanics

CAN YOU PLZ TELL TELL ME HOW TO SOLVE THE 14TH QUESTION.
ITS ABOUT VECTORS AND I DON’T HAVE MORE KNOWLEDGE ABOUT VECTORS

Question image for CAN YOU PLZ TELL TELL ME HOW TO SOLVE THE 14TH QU
Profile image of OMKAR RAJALE
8 Years agoGrade 12
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1 Answer

Profile image of Arun
8 Years ago
Dear student
 
As we know
 
a = dv/dt = (2t+5)i
 
Now
 
dv = (2t+5) dt
 
v = t² + 5t +c
 
As at t= 0, v will be zero.
 
Hence
 
0 = 0 +0 + c
 
c = 0
 
Hence
 
v = t² + 5t
 
Hence at t= 5
v = 25 +25
 
v = 50 m/sec

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