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What to do after finding the magnitude of p? Q.24

What to do after finding the magnitude of p? Q.24

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Grade:10

4 Answers

Neeti
571 Points
8 years ago
is the answer 90 degrees?
Riddhi Roy
31 Points
8 years ago
Yes correct. How to solve?
Neeti
571 Points
8 years ago
see, we know that F.dt = dp where F.dt = impulse.
Neeti
571 Points
8 years ago
Sorry i typed the entire answer i don’t know why it didn’t get posted. 
We know that F\Deltat = \Deltap where F\Deltat = impulse. 
Px and Py are given, now you know the relation between P and F, So on differentiating Px with respect to t you get Fx and on differentiating Py with respect to t you get Fy.
Py is 2sin t and on differentiating you get Fy = 2cos t. Now you see that both differ by an angle of 90. same for Fx and Px. therefore P and F differ by an angle of 90.
Please approve the answer if you like it and feel free to ask any follow-up question :)

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