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please answer this

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Asked by Prashant DIGHE 1st April 2020, 10:29 PM
Answered by Expert
Answer:
 begin mathsize 14px style v with rightwards arrow on top end style is velocity and at certain instant it is given by, begin mathsize 14px style v with rightwards arrow on top space equals space 3 space i with hat on top space plus space 4 space j with hat on top end style
At same instant acceleration is given by,  begin mathsize 14px style a with rightwards arrow on top space equals space i with hat on top space plus space j with hat on top end style
If Rate of change of velocity = projection of begin mathsize 14px style a with rightwards arrow on top end style on begin mathsize 14px style v with rightwards arrow on top end style
Then rate of change of velocity = (  begin mathsize 14px style a with rightwards arrow on top end style · begin mathsize 14px style v with rightwards arrow on top end style ) / | begin mathsize 14px style v with rightwards arrow on top end style | = ( 3 + 4 ) / ( 32 + 42 )1/2 = 7/5
Answered by Expert 2nd April 2020, 7:56 AM
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