document.write( "Question 41864: speed of a dropped object. If we neglect the resistnace of air, the (downward) speed of an object t seconds after being dropped is given by v=32t feet per second. How many seconds does it take an object to reach a downward speed of 100 miles per hour? recall that there are 5280 feet in one mile, since you will need to express 100 mph in feet per second. \n" ); document.write( "
Algebra.Com's Answer #27092 by fractalier(6550)![]() ![]() You can put this solution on YOUR website! Okay...we can convert mph to fps via the relationship \n" ); document.write( "60 miles per hour = 88 feet per second so that \n" ); document.write( "100 miles per hour = 146 2/3 feet per second. \n" ); document.write( "Thus we solve for t and get \n" ); document.write( "t = v/32 \n" ); document.write( "t = (146 2/3) / 32 \n" ); document.write( "t = 55/12 sec = 4 7/12 sec \n" ); document.write( " |