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Mathhelp346
Group Title
PLEASE HELP:
An automobile accelerates at 1.77 m/s^2 over 6.00s to reach the freeway speed at the end of an entrance ramp. If the car's final speed is 88.0 km/h, what was its initial speed when it began accelerating? Express your answer in kilometers per hour.
 2 years ago
 2 years ago
Mathhelp346 Group Title
PLEASE HELP: An automobile accelerates at 1.77 m/s^2 over 6.00s to reach the freeway speed at the end of an entrance ramp. If the car's final speed is 88.0 km/h, what was its initial speed when it began accelerating? Express your answer in kilometers per hour.
 2 years ago
 2 years ago

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micahwood50 Group TitleBest ResponseYou've already chosen the best response.1
\[a = \frac{\Delta v}{t} = \frac{v_f  v_o}{t}\]
 2 years ago

micahwood50 Group TitleBest ResponseYou've already chosen the best response.1
Use this formula.
 2 years ago

Mathhelp346 Group TitleBest ResponseYou've already chosen the best response.0
i know the formula im just having trouble converting the units
 2 years ago

micahwood50 Group TitleBest ResponseYou've already chosen the best response.1
Alright, let convert 88 km/h to m/s. \[\frac{ 88 \text{km} }{ \text{h} }\cdot\frac{ 1000 \text{m}}{ \text{km} }\cdot\frac{ 1 \text{h} }{ 3600\text{s} } = ?\]
 2 years ago

micahwood50 Group TitleBest ResponseYou've already chosen the best response.1
dw:1349065649701:dw
 2 years ago

micahwood50 Group TitleBest ResponseYou've already chosen the best response.1
Does this clear everything?
 2 years ago

micahwood50 Group TitleBest ResponseYou've already chosen the best response.1
Yeah, now find Vo Then convert it back to km/h
 2 years ago

Mathhelp346 Group TitleBest ResponseYou've already chosen the best response.0
so is it 13.78?
 2 years ago

micahwood50 Group TitleBest ResponseYou've already chosen the best response.1
13.78 Is it in m/s ?
 2 years ago

Mathhelp346 Group TitleBest ResponseYou've already chosen the best response.0
oops yes
 2 years ago

Mathhelp346 Group TitleBest ResponseYou've already chosen the best response.0
how would i convert it back
 2 years ago

micahwood50 Group TitleBest ResponseYou've already chosen the best response.1
Let me show you. dw:1349067937197:dw
 2 years ago

micahwood50 Group TitleBest ResponseYou've already chosen the best response.1
dw:1349068014177:dw
 2 years ago

micahwood50 Group TitleBest ResponseYou've already chosen the best response.1
\[\frac{13.78 \cdot 3600 \text{km}}{1000 \text{h}}\]
 2 years ago

micahwood50 Group TitleBest ResponseYou've already chosen the best response.1
Just treat units as "variable." You know what I mean?
 2 years ago

Mathhelp346 Group TitleBest ResponseYou've already chosen the best response.0
so it would be 49.6 km/h
 2 years ago

micahwood50 Group TitleBest ResponseYou've already chosen the best response.1
That's correct.
 2 years ago
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