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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.
 one year ago
 one year ago
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.
 one year ago
 one year ago

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micahwood50Best ResponseYou've already chosen the best response.1
\[a = \frac{\Delta v}{t} = \frac{v_f  v_o}{t}\]
 one year ago

Mathhelp346Best ResponseYou've already chosen the best response.0
i know the formula im just having trouble converting the units
 one year ago

micahwood50Best ResponseYou've already chosen the best response.1
Alright, let convert 88 km/h to m/s. \[\frac{ 88 \text{km} }{ \text{h} }\cdot\frac{ 1000 \text{m}}{ \text{km} }\cdot\frac{ 1 \text{h} }{ 3600\text{s} } = ?\]
 one year ago

micahwood50Best ResponseYou've already chosen the best response.1
dw:1349065649701:dw
 one year ago

micahwood50Best ResponseYou've already chosen the best response.1
Does this clear everything?
 one year ago

micahwood50Best ResponseYou've already chosen the best response.1
Yeah, now find Vo Then convert it back to km/h
 one year ago

micahwood50Best ResponseYou've already chosen the best response.1
13.78 Is it in m/s ?
 one year ago

Mathhelp346Best ResponseYou've already chosen the best response.0
how would i convert it back
 one year ago

micahwood50Best ResponseYou've already chosen the best response.1
Let me show you. dw:1349067937197:dw
 one year ago

micahwood50Best ResponseYou've already chosen the best response.1
dw:1349068014177:dw
 one year ago

micahwood50Best ResponseYou've already chosen the best response.1
\[\frac{13.78 \cdot 3600 \text{km}}{1000 \text{h}}\]
 one year ago

micahwood50Best ResponseYou've already chosen the best response.1
Just treat units as "variable." You know what I mean?
 one year ago

Mathhelp346Best ResponseYou've already chosen the best response.0
so it would be 49.6 km/h
 one year ago
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