HELP PLEASE I BEG | Tuontoes | Page 1

mild raptor Nov 6, 2023, 6:12 AM

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how would i find the zeroes of v(t)= -1.8cos(0.4t) + 0.72tsin(0.4t) if i’m trying to find when a particle changes direction

tacit sundial Nov 6, 2023, 6:29 AM

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ummmm

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so wait you wanna find when the velocity changes direction or the position?

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if it’s just velocity you set it equal to 0

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and solve for t

mild raptor Nov 6, 2023, 6:49 AM

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i tried

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but i got stuck

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like what do i do after i set it equal to zero

open nacelle Nov 6, 2023, 6:49 AM

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Can i see ur steps

mild raptor Nov 6, 2023, 6:50 AM

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do i u sub? do i move one part to one side?

open nacelle Nov 6, 2023, 6:59 AM

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Not too sure about this one, it’s all correct up till the last line though

mild raptor Nov 6, 2023, 7:01 AM

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do i not set it equal to zero?

open nacelle Nov 6, 2023, 7:14 AM

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Heres what I got
When t = 2.15
-1.8cos(0.4t) + 0.72tsin(0.4t) = -0.001247 ≈ 0

So the value of t is somewhere around 2.15
v(2.15) ≈ 0

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Headspinner

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Theres no boundaries either it will reach zero more than one time

#HELP PLEASE I BEG