document.write( "Question 30844: Its been a long time since I did problems like this. I know there a formula just can't remember, can you please walk me through them. Thanks\r
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\n" ); document.write( "\n" ); document.write( "A)How many seconds should elapse between two consecutive mile markers if the
\n" ); document.write( "car's average speed is 65 mi/hr?\r
\n" ); document.write( "\n" ); document.write( "B)What is the car's average speed if it takes 65 s to travel between the mile markers?\r
\n" ); document.write( "\n" ); document.write( "Question 2: A car with an initial velocity of 3.5 m/s coasts with the engine off and the transmission in neutral. If the combined effect of air resistance and rolling friction causes a constant deceleration of 0.50 m/s2, after how long a time will the car come to a stop?\r
\n" ); document.write( "\n" ); document.write( "Question 3: An arrow is shot vertically upward. Three seconds later, it is at a height of 35m.
\n" ); document.write( "A)What was the initial speed of the arrow?
\n" ); document.write( "B)How long is the arrow in flight from launch to returning to the initial height? (Assume the arrow falls vertically downward.)
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Algebra.Com's Answer #17610 by acerX(62)\"\" \"About 
You can put this solution on YOUR website!

\n" ); document.write( "#1
\n" ); document.write( "A)
\n" ); document.write( "\"65mi%2Fhr+=+1mi%2FXhrs\"
\n" ); document.write( "\"65X=1\" divide by 65
\n" ); document.write( "\"x=1%2F65+or+0.01538+HOURS\"
\n" ); document.write( "\"0.01538hours+%2A+%2860mins%2Fhour%29+%2A+%2860secs%2Fmin%29+=+55.38secs+per+mile\"\r
\n" ); document.write( "\n" ); document.write( "B)
\n" ); document.write( "\"speed+=+distance%2Ftime\"
\n" ); document.write( "\"speed+=+1mile%2F65sec\" see part A.\r
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\n" ); document.write( "#2
\n" ); document.write( "\"acceleration+=+%28change+in+velocity%29%2Ftime\"
\n" ); document.write( "\"A=V%2Ft\" or \"t=V%2FA\"
\n" ); document.write( "\"t=3.5%2F0.5+=+7+seconds\"\r
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\n" ); document.write( "#3
\n" ); document.write( "A) Gravity has an acceleration of -9.8m/s
\n" ); document.write( "\"A=V%2Ft\" or \"V=At\"
\n" ); document.write( "\"V=-9.8%2835%29=-343m%2Fs\" we are looking for the magnitude of the velocity or V=343m/s\r
\n" ); document.write( "\n" ); document.write( "B) Im not sure what you are looking for here. What is the original height? the launch height the height at 35 seconds? etc.
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