Author Topic: 5/3/2018 Dynamics  (Read 465 times)

FastTrack Guru

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5/3/2018 Dynamics
« on: May 03, 2018, 11:50:31 AM »
An 18 wheeler has a mass of 28,000 kilograms when fully loaded. The truck goes from 0 to 90 kilometers per hour in 120 seconds. What is the force on the 18 wheeler due to acceleration?


 A) 4.08 kN
 B) 17.82 kN
 C) 9.71 kN
 D) 5.83 kN

Timmy_s123

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Re: 5/3/2018 Dynamics
« Reply #1 on: May 03, 2018, 11:54:29 AM »
Where in the FE handbook is the general physics equations?  I know "how" to do these types of problems, just need to know where to fcking look to find the equations.

finding_alpha

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Re: 5/3/2018 Dynamics
« Reply #2 on: May 03, 2018, 12:12:33 PM »
Dude, look it up on the damn book. There's a dynamics section in the table of contents,  the equation for acceleration is in that section.  Once you find acceleration,  use the equation F = MA  (plug in Mass which is given in the problem) to find the Force.

FastTrack Guru

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Re: 5/3/2018 Dynamics
« Reply #3 on: May 04, 2018, 09:03:52 AM »
The answer is D.

Find acelleration from a = v1-v0 / time.

Then,  use f = ma

Simple.

Richie_rich

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Re: 5/3/2018 Dynamics
« Reply #4 on: May 04, 2018, 11:32:38 AM »
ok.. one for one!   keep them coming.

Steviewonder

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Re: 5/3/2018 Dynamics
« Reply #5 on: May 04, 2018, 12:17:04 PM »
that was simple dude, hope you got it right.  go kill yourself.

johnnyzx

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Re: 5/3/2018 Dynamics
« Reply #6 on: May 04, 2018, 12:38:52 PM »
keep it clean guys..   no cursing or derogatory comments.  Mods will ban you.     

Yes, that was an easy problem!

levi2144

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Re: 5/3/2018 Dynamics
« Reply #7 on: May 13, 2018, 03:19:37 PM »
ans D