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#1 2017-07-03 21:08:45

tyuighp
Member
Registered: 2015-12-04
Posts: 12

Find F

Suppose a particle of mass 3kg moves under the influence of a force F newten The velocity of the particle is given by
v =(1-sin 2t)i+(-1+cos 2t)j , v m\s
Find F ,and F is constant or not

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#2 2017-07-04 00:26:51

zetafunc
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Registered: 2014-05-21
Posts: 2,128
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Re: Find F

You might like to try differentiating
, then using
This gives you
as a function of
. Is it constant or does it vary with
?

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#3 2017-07-04 03:54:15

tyuighp
Member
Registered: 2015-12-04
Posts: 12

Re: Find F

thank you but if

then

Last edited by tyuighp (2017-07-04 03:55:42)

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#4 2017-07-04 04:16:11

zetafunc
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Registered: 2014-05-21
Posts: 2,128
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Re: Find F

That tells you that the magnitude of the force is constant, but the force itself is not.

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#5 2017-07-04 04:40:03

tyuighp
Member
Registered: 2015-12-04
Posts: 12

Re: Find F

Yes I have some turbulence
Is the force constant or variable

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#6 2017-07-04 05:17:13

zetafunc
Moderator
Registered: 2014-05-21
Posts: 2,128
Website

Re: Find F

It is variable, because its vector components each depend on
.

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